Finding the Fourth Proportional to 12,073.30, 18,071.55 and 8,617.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,073.30 : 18,071.55 = 8,617.30 : x
2. Step 2: Convert to fraction form
   12,073.30/18,071.55 = 8,617.30/x
3. Step 3: Cross multiply
   12,073.30x = 18,071.55 × 8,617.30
4. Step 4: Simplify right side
   12,073.30x = 155,727,967.82
5. Step 5: Solve for x
   x = 155,727,967.82/12,073.30
6. Step 6: Final answer
   x = 12,898.54