Finding the Fourth Proportional to 1,090.59, 1,506.09 and 932.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.59 : 1,506.09 = 932.31 : x
2. Step 2: Convert to fraction form
   1,090.59/1,506.09 = 932.31/x
3. Step 3: Cross multiply
   1,090.59x = 1,506.09 × 932.31
4. Step 4: Simplify right side
   1,090.59x = 1,404,142.77
5. Step 5: Solve for x
   x = 1,404,142.77/1,090.59
6. Step 6: Final answer
   x = 1,287.51