Finding the Fourth Proportional to 1,105,606.75, 1,658,404.61 and 431,756.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105,606.75 : 1,658,404.61 = 431,756.52 : x
2. Step 2: Convert to fraction form
   1,105,606.75/1,658,404.61 = 431,756.52/x
3. Step 3: Cross multiply
   1,105,606.75x = 1,658,404.61 × 431,756.52
4. Step 4: Simplify right side
   1,105,606.75x = 716,027,003,165.56
5. Step 5: Solve for x
   x = 716,027,003,165.56/1,105,606.75
6. Step 6: Final answer
   x = 647,632.63