Finding the Fourth Proportional to 749,769.89, 1,034,680.17 and 405,605.72

Step by Step Solution

1. Step 1: Write the proportion equation
   749,769.89 : 1,034,680.17 = 405,605.72 : x
2. Step 2: Convert to fraction form
   749,769.89/1,034,680.17 = 405,605.72/x
3. Step 3: Cross multiply
   749,769.89x = 1,034,680.17 × 405,605.72
4. Step 4: Simplify right side
   749,769.89x = 419,672,197,909.27
5. Step 5: Solve for x
   x = 419,672,197,909.27/749,769.89
6. Step 6: Final answer
   x = 559,734.66