Finding the Fourth Proportional to 1,525,084,505.55, 2,104,501,116.67 and 855,900,309.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525,084,505.55 : 2,104,501,116.67 = 855,900,309.21 : x
2. Step 2: Convert to fraction form
   1,525,084,505.55/2,104,501,116.67 = 855,900,309.21/x
3. Step 3: Cross multiply
   1,525,084,505.55x = 2,104,501,116.67 × 855,900,309.21
4. Step 4: Simplify right side
   1,525,084,505.55x = 1,801,243,156,490,643,456
5. Step 5: Solve for x
   x = 1,801,243,156,490,643,456/1,525,084,505.55
6. Step 6: Final answer
   x = 1,181,077,605.82