Finding the Fourth Proportional to 1,092.85, 1,631.27 and 939.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.85 : 1,631.27 = 939.76 : x
2. Step 2: Convert to fraction form
   1,092.85/1,631.27 = 939.76/x
3. Step 3: Cross multiply
   1,092.85x = 1,631.27 × 939.76
4. Step 4: Simplify right side
   1,092.85x = 1,533,002.30
5. Step 5: Solve for x
   x = 1,533,002.30/1,092.85
6. Step 6: Final answer
   x = 1,402.76