Finding the Fourth Proportional to 13,132.63, 18,123.12 and 7,164.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,132.63 : 18,123.12 = 7,164.25 : x
2. Step 2: Convert to fraction form
   13,132.63/18,123.12 = 7,164.25/x
3. Step 3: Cross multiply
   13,132.63x = 18,123.12 × 7,164.25
4. Step 4: Simplify right side
   13,132.63x = 129,838,562.46
5. Step 5: Solve for x
   x = 129,838,562.46/13,132.63
6. Step 6: Final answer
   x = 9,886.71