Finding the Fourth Proportional to 13,127.58, 18,116.04 and 7,159.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,127.58 : 18,116.04 = 7,159.25 : x
2. Step 2: Convert to fraction form
   13,127.58/18,116.04 = 7,159.25/x
3. Step 3: Cross multiply
   13,127.58x = 18,116.04 × 7,159.25
4. Step 4: Simplify right side
   13,127.58x = 129,697,168.79
5. Step 5: Solve for x
   x = 129,697,168.79/13,127.58
6. Step 6: Final answer
   x = 9,879.75