Finding the Fourth Proportional to 12,108.39, 18,162.73 and 7,901.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,108.39 : 18,162.73 = 7,901.15 : x
2. Step 2: Convert to fraction form
   12,108.39/18,162.73 = 7,901.15/x
3. Step 3: Cross multiply
   12,108.39x = 18,162.73 × 7,901.15
4. Step 4: Simplify right side
   12,108.39x = 143,506,373.20
5. Step 5: Solve for x
   x = 143,506,373.20/12,108.39
6. Step 6: Final answer
   x = 11,851.82