Finding the Fourth Proportional to 2,086.58, 3,129.98 and 625.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.58 : 3,129.98 = 625.59 : x
2. Step 2: Convert to fraction form
   2,086.58/3,129.98 = 625.59/x
3. Step 3: Cross multiply
   2,086.58x = 3,129.98 × 625.59
4. Step 4: Simplify right side
   2,086.58x = 1,958,081.06
5. Step 5: Solve for x
   x = 1,958,081.06/2,086.58
6. Step 6: Final answer
   x = 938.42