Finding the Fourth Proportional to 1,218,269,223.14, 1,681,231,978.42 and 661,352,268.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,269,223.14 : 1,681,231,978.42 = 661,352,268.38 : x
2. Step 2: Convert to fraction form
   1,218,269,223.14/1,681,231,978.42 = 661,352,268.38/x
3. Step 3: Cross multiply
   1,218,269,223.14x = 1,681,231,978.42 × 661,352,268.38
4. Step 4: Simplify right side
   1,218,269,223.14x = 1,111,886,582,591,002,624
5. Step 5: Solve for x
   x = 1,111,886,582,591,002,624/1,218,269,223.14
6. Step 6: Final answer
   x = 912,677,232.16