Finding the Fourth Proportional to 12,402.72, 18,599.52 and 5,005.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.72 : 18,599.52 = 5,005.20 : x
2. Step 2: Convert to fraction form
   12,402.72/18,599.52 = 5,005.20/x
3. Step 3: Cross multiply
   12,402.72x = 18,599.52 × 5,005.20
4. Step 4: Simplify right side
   12,402.72x = 93,094,317.50
5. Step 5: Solve for x
   x = 93,094,317.50/12,402.72
6. Step 6: Final answer
   x = 7,505.96