Finding the Fourth Proportional to 2,087.56, 3,131.34 and 932.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.56 : 3,131.34 = 932.50 : x
2. Step 2: Convert to fraction form
   2,087.56/3,131.34 = 932.50/x
3. Step 3: Cross multiply
   2,087.56x = 3,131.34 × 932.50
4. Step 4: Simplify right side
   2,087.56x = 2,919,974.55
5. Step 5: Solve for x
   x = 2,919,974.55/2,087.56
6. Step 6: Final answer
   x = 1,398.75