Finding the Fourth Proportional to 22,530.50, 31,090.74 and 12,458.15

Step by Step Solution

1. Step 1: Write the proportion equation
   22,530.50 : 31,090.74 = 12,458.15 : x
2. Step 2: Convert to fraction form
   22,530.50/31,090.74 = 12,458.15/x
3. Step 3: Cross multiply
   22,530.50x = 31,090.74 × 12,458.15
4. Step 4: Simplify right side
   22,530.50x = 387,332,947.08
5. Step 5: Solve for x
   x = 387,332,947.08/22,530.50
6. Step 6: Final answer
   x = 17,191.50