Finding the Fourth Proportional to 12,981.12, 17,908.20 and 10,194.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.12 : 17,908.20 = 10,194.72 : x
2. Step 2: Convert to fraction form
   12,981.12/17,908.20 = 10,194.72/x
3. Step 3: Cross multiply
   12,981.12x = 17,908.20 × 10,194.72
4. Step 4: Simplify right side
   12,981.12x = 182,569,084.70
5. Step 5: Solve for x
   x = 182,569,084.70/12,981.12
6. Step 6: Final answer
   x = 14,064.20