Finding the Fourth Proportional to 2,092.47, 3,139.16 and 631.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.47 : 3,139.16 = 631.77 : x
2. Step 2: Convert to fraction form
   2,092.47/3,139.16 = 631.77/x
3. Step 3: Cross multiply
   2,092.47x = 3,139.16 × 631.77
4. Step 4: Simplify right side
   2,092.47x = 1,983,223.95
5. Step 5: Solve for x
   x = 1,983,223.95/2,092.47
6. Step 6: Final answer
   x = 947.79