Finding the Fourth Proportional to 915,782.78, 1,263,857.85 and 508,016.00

Step by Step Solution

1. Step 1: Write the proportion equation
   915,782.78 : 1,263,857.85 = 508,016.00 : x
2. Step 2: Convert to fraction form
   915,782.78/1,263,857.85 = 508,016.00/x
3. Step 3: Cross multiply
   915,782.78x = 1,263,857.85 × 508,016.00
4. Step 4: Simplify right side
   915,782.78x = 642,060,003,206.31
5. Step 5: Solve for x
   x = 642,060,003,206.31/915,782.78
6. Step 6: Final answer
   x = 701,105.13