Finding the Fourth Proportional to 1,561.88, 2,154.89 and 932.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.88 : 2,154.89 = 932.51 : x
2. Step 2: Convert to fraction form
   1,561.88/2,154.89 = 932.51/x
3. Step 3: Cross multiply
   1,561.88x = 2,154.89 × 932.51
4. Step 4: Simplify right side
   1,561.88x = 2,009,441.04
5. Step 5: Solve for x
   x = 2,009,441.04/1,561.88
6. Step 6: Final answer
   x = 1,286.56