Finding the Fourth Proportional to 12,318.89, 17,002.10 and 10,076.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,318.89 : 17,002.10 = 10,076.30 : x
2. Step 2: Convert to fraction form
   12,318.89/17,002.10 = 10,076.30/x
3. Step 3: Cross multiply
   12,318.89x = 17,002.10 × 10,076.30
4. Step 4: Simplify right side
   12,318.89x = 171,318,264.17
5. Step 5: Solve for x
   x = 171,318,264.17/12,318.89
6. Step 6: Final answer
   x = 13,906.96