Finding the Fourth Proportional to 1,561.61, 2,155.14 and 932.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.61 : 2,155.14 = 932.33 : x
2. Step 2: Convert to fraction form
   1,561.61/2,155.14 = 932.33/x
3. Step 3: Cross multiply
   1,561.61x = 2,155.14 × 932.33
4. Step 4: Simplify right side
   1,561.61x = 2,009,290.90
5. Step 5: Solve for x
   x = 2,009,290.90/1,561.61
6. Step 6: Final answer
   x = 1,286.68