Finding the Fourth Proportional to 763,105.89, 1,053,098.47 and 418,973.55

Step by Step Solution

1. Step 1: Write the proportion equation
   763,105.89 : 1,053,098.47 = 418,973.55 : x
2. Step 2: Convert to fraction form
   763,105.89/1,053,098.47 = 418,973.55/x
3. Step 3: Cross multiply
   763,105.89x = 1,053,098.47 × 418,973.55
4. Step 4: Simplify right side
   763,105.89x = 441,220,401,050.07
5. Step 5: Solve for x
   x = 441,220,401,050.07/763,105.89
6. Step 6: Final answer
   x = 578,190.27