Finding the Fourth Proportional to 12,457.59, 17,181.75 and 7,981.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,457.59 : 17,181.75 = 7,981.76 : x
2. Step 2: Convert to fraction form
   12,457.59/17,181.75 = 7,981.76/x
3. Step 3: Cross multiply
   12,457.59x = 17,181.75 × 7,981.76
4. Step 4: Simplify right side
   12,457.59x = 137,140,604.88
5. Step 5: Solve for x
   x = 137,140,604.88/12,457.59
6. Step 6: Final answer
   x = 11,008.60