Finding the Fourth Proportional to 2,092.79, 3,139.52 and 631.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.79 : 3,139.52 = 631.77 : x
2. Step 2: Convert to fraction form
   2,092.79/3,139.52 = 631.77/x
3. Step 3: Cross multiply
   2,092.79x = 3,139.52 × 631.77
4. Step 4: Simplify right side
   2,092.79x = 1,983,451.39
5. Step 5: Solve for x
   x = 1,983,451.39/2,092.79
6. Step 6: Final answer
   x = 947.75