Finding the Fourth Proportional to 2,086.16, 3,129.78 and 625.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.16 : 3,129.78 = 625.32 : x
2. Step 2: Convert to fraction form
   2,086.16/3,129.78 = 625.32/x
3. Step 3: Cross multiply
   2,086.16x = 3,129.78 × 625.32
4. Step 4: Simplify right side
   2,086.16x = 1,957,114.03
5. Step 5: Solve for x
   x = 1,957,114.03/2,086.16
6. Step 6: Final answer
   x = 938.14