Finding the Fourth Proportional to 12,487.28, 18,726.59 and 4,165.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.28 : 18,726.59 = 4,165.34 : x
2. Step 2: Convert to fraction form
   12,487.28/18,726.59 = 4,165.34/x
3. Step 3: Cross multiply
   12,487.28x = 18,726.59 × 4,165.34
4. Step 4: Simplify right side
   12,487.28x = 78,002,531.17
5. Step 5: Solve for x
   x = 78,002,531.17/12,487.28
6. Step 6: Final answer
   x = 6,246.56