Finding the Fourth Proportional to 1,153.79, 1,590.86 and 932.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.79 : 1,590.86 = 932.05 : x
2. Step 2: Convert to fraction form
   1,153.79/1,590.86 = 932.05/x
3. Step 3: Cross multiply
   1,153.79x = 1,590.86 × 932.05
4. Step 4: Simplify right side
   1,153.79x = 1,482,759.42
5. Step 5: Solve for x
   x = 1,482,759.42/1,153.79
6. Step 6: Final answer
   x = 1,285.13