Finding the Fourth Proportional to 12,388.18, 18,587.72 and 5,007.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.18 : 18,587.72 = 5,007.06 : x
2. Step 2: Convert to fraction form
   12,388.18/18,587.72 = 5,007.06/x
3. Step 3: Cross multiply
   12,388.18x = 18,587.72 × 5,007.06
4. Step 4: Simplify right side
   12,388.18x = 93,069,829.30
5. Step 5: Solve for x
   x = 93,069,829.30/12,388.18
6. Step 6: Final answer
   x = 7,512.79