Finding the Fourth Proportional to 12,485.47, 18,595.72 and 12,425.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485.47 : 18,595.72 = 12,425.10 : x
2. Step 2: Convert to fraction form
   12,485.47/18,595.72 = 12,425.10/x
3. Step 3: Cross multiply
   12,485.47x = 18,595.72 × 12,425.10
4. Step 4: Simplify right side
   12,485.47x = 231,053,618.45
5. Step 5: Solve for x
   x = 231,053,618.45/12,485.47
6. Step 6: Final answer
   x = 18,505.81