Finding the Fourth Proportional to 939,807.59, 1,296,899.78 and 510,078.49

Step by Step Solution

1. Step 1: Write the proportion equation
   939,807.59 : 1,296,899.78 = 510,078.49 : x
2. Step 2: Convert to fraction form
   939,807.59/1,296,899.78 = 510,078.49/x
3. Step 3: Cross multiply
   939,807.59x = 1,296,899.78 × 510,078.49
4. Step 4: Simplify right side
   939,807.59x = 661,520,681,463.73
5. Step 5: Solve for x
   x = 661,520,681,463.73/939,807.59
6. Step 6: Final answer
   x = 703,889.49