Finding the Fourth Proportional to 8,325.58, 12,488.84 and 3,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,325.58 : 12,488.84 = 3,131.50 : x
2. Step 2: Convert to fraction form
   8,325.58/12,488.84 = 3,131.50/x
3. Step 3: Cross multiply
   8,325.58x = 12,488.84 × 3,131.50
4. Step 4: Simplify right side
   8,325.58x = 39,108,740.02
5. Step 5: Solve for x
   x = 39,108,740.02/8,325.58
6. Step 6: Final answer
   x = 4,697.42