Finding the Fourth Proportional to 10,036.18, 15,042.12 and 8,855.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,036.18 : 15,042.12 = 8,855.20 : x
2. Step 2: Convert to fraction form
   10,036.18/15,042.12 = 8,855.20/x
3. Step 3: Cross multiply
   10,036.18x = 15,042.12 × 8,855.20
4. Step 4: Simplify right side
   10,036.18x = 133,200,981.02
5. Step 5: Solve for x
   x = 133,200,981.02/10,036.18
6. Step 6: Final answer
   x = 13,272.08