Finding the Fourth Proportional to 12,457.46, 17,181.56 and 7,981.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,457.46 : 17,181.56 = 7,981.63 : x
2. Step 2: Convert to fraction form
   12,457.46/17,181.56 = 7,981.63/x
3. Step 3: Cross multiply
   12,457.46x = 17,181.56 × 7,981.63
4. Step 4: Simplify right side
   12,457.46x = 137,136,831.74
5. Step 5: Solve for x
   x = 137,136,831.74/12,457.46
6. Step 6: Final answer
   x = 11,008.41