Finding the Fourth Proportional to 12,916.94, 17,824.11 and 7,250.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,916.94 : 17,824.11 = 7,250.72 : x
2. Step 2: Convert to fraction form
   12,916.94/17,824.11 = 7,250.72/x
3. Step 3: Cross multiply
   12,916.94x = 17,824.11 × 7,250.72
4. Step 4: Simplify right side
   12,916.94x = 129,237,630.86
5. Step 5: Solve for x
   x = 129,237,630.86/12,916.94
6. Step 6: Final answer
   x = 10,005.28