Finding the Fourth Proportional to 1,105,612.14, 1,658,412.77 and 431,761.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105,612.14 : 1,658,412.77 = 431,761.89 : x
2. Step 2: Convert to fraction form
   1,105,612.14/1,658,412.77 = 431,761.89/x
3. Step 3: Cross multiply
   1,105,612.14x = 1,658,412.77 × 431,761.89
4. Step 4: Simplify right side
   1,105,612.14x = 716,039,429,816.53
5. Step 5: Solve for x
   x = 716,039,429,816.53/1,105,612.14
6. Step 6: Final answer
   x = 647,640.71