Finding the Fourth Proportional to 13,200.86, 18,217.34 and 7,232.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.86 : 18,217.34 = 7,232.78 : x
2. Step 2: Convert to fraction form
   13,200.86/18,217.34 = 7,232.78/x
3. Step 3: Cross multiply
   13,200.86x = 18,217.34 × 7,232.78
4. Step 4: Simplify right side
   13,200.86x = 131,761,885.15
5. Step 5: Solve for x
   x = 131,761,885.15/13,200.86
6. Step 6: Final answer
   x = 9,981.31