Finding the Fourth Proportional to 1,132,646.16, 1,562,699.88 and 642,535.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132,646.16 : 1,562,699.88 = 642,535.20 : x
2. Step 2: Convert to fraction form
   1,132,646.16/1,562,699.88 = 642,535.20/x
3. Step 3: Cross multiply
   1,132,646.16x = 1,562,699.88 × 642,535.20
4. Step 4: Simplify right side
   1,132,646.16x = 1,004,089,679,935.78
5. Step 5: Solve for x
   x = 1,004,089,679,935.78/1,132,646.16
6. Step 6: Final answer
   x = 886,498.99