Finding the Fourth Proportional to 1,561.46, 2,155.28 and 932.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.46 : 2,155.28 = 932.43 : x
2. Step 2: Convert to fraction form
   1,561.46/2,155.28 = 932.43/x
3. Step 3: Cross multiply
   1,561.46x = 2,155.28 × 932.43
4. Step 4: Simplify right side
   1,561.46x = 2,009,650.06
5. Step 5: Solve for x
   x = 2,009,650.06/1,561.46
6. Step 6: Final answer
   x = 1,287.03