Finding the Fourth Proportional to 12,487.47, 18,598.69 and 12,427.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.47 : 18,598.69 = 12,427.10 : x
2. Step 2: Convert to fraction form
   12,487.47/18,598.69 = 12,427.10/x
3. Step 3: Cross multiply
   12,487.47x = 18,598.69 × 12,427.10
4. Step 4: Simplify right side
   12,487.47x = 231,127,780.50
5. Step 5: Solve for x
   x = 231,127,780.50/12,487.47
6. Step 6: Final answer
   x = 18,508.78