Finding the Fourth Proportional to 750,042.72, 1,035,061.68 and 405,878.61

Step by Step Solution

1. Step 1: Write the proportion equation
   750,042.72 : 1,035,061.68 = 405,878.61 : x
2. Step 2: Convert to fraction form
   750,042.72/1,035,061.68 = 405,878.61/x
3. Step 3: Cross multiply
   750,042.72x = 1,035,061.68 × 405,878.61
4. Step 4: Simplify right side
   750,042.72x = 420,109,398,530.32
5. Step 5: Solve for x
   x = 420,109,398,530.32/750,042.72
6. Step 6: Final answer
   x = 560,113.96