Finding the Fourth Proportional to 913,822.50, 1,261,070.42 and 500,351.78

Step by Step Solution

1. Step 1: Write the proportion equation
   913,822.50 : 1,261,070.42 = 500,351.78 : x
2. Step 2: Convert to fraction form
   913,822.50/1,261,070.42 = 500,351.78/x
3. Step 3: Cross multiply
   913,822.50x = 1,261,070.42 × 500,351.78
4. Step 4: Simplify right side
   913,822.50x = 630,978,823,047.00
5. Step 5: Solve for x
   x = 630,978,823,047.00/913,822.50
6. Step 6: Final answer
   x = 690,482.91