Finding the Fourth Proportional to 12,981.62, 17,914.40 and 7,316.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.62 : 17,914.40 = 7,316.60 : x
2. Step 2: Convert to fraction form
   12,981.62/17,914.40 = 7,316.60/x
3. Step 3: Cross multiply
   12,981.62x = 17,914.40 × 7,316.60
4. Step 4: Simplify right side
   12,981.62x = 131,072,499.04
5. Step 5: Solve for x
   x = 131,072,499.04/12,981.62
6. Step 6: Final answer
   x = 10,096.78