Finding the Fourth Proportional to 13,133.73, 18,124.31 and 7,165.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,133.73 : 18,124.31 = 7,165.25 : x
2. Step 2: Convert to fraction form
   13,133.73/18,124.31 = 7,165.25/x
3. Step 3: Cross multiply
   13,133.73x = 18,124.31 × 7,165.25
4. Step 4: Simplify right side
   13,133.73x = 129,865,085.78
5. Step 5: Solve for x
   x = 129,865,085.78/13,133.73
6. Step 6: Final answer
   x = 9,887.91