Finding the Fourth Proportional to 13,132.50, 18,122.83 and 7,164.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,132.50 : 18,122.83 = 7,164.15 : x
2. Step 2: Convert to fraction form
   13,132.50/18,122.83 = 7,164.15/x
3. Step 3: Cross multiply
   13,132.50x = 18,122.83 × 7,164.15
4. Step 4: Simplify right side
   13,132.50x = 129,834,677.94
5. Step 5: Solve for x
   x = 129,834,677.94/13,132.50
6. Step 6: Final answer
   x = 9,886.52