Finding the Fourth Proportional to 13,088.12, 18,061.10 and 7,119.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,088.12 : 18,061.10 = 7,119.78 : x
2. Step 2: Convert to fraction form
   13,088.12/18,061.10 = 7,119.78/x
3. Step 3: Cross multiply
   13,088.12x = 18,061.10 × 7,119.78
4. Step 4: Simplify right side
   13,088.12x = 128,591,022.96
5. Step 5: Solve for x
   x = 128,591,022.96/13,088.12
6. Step 6: Final answer
   x = 9,825.02