Finding the Fourth Proportional to 12,462.52, 17,191.32 and 7,916.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,462.52 : 17,191.32 = 7,916.80 : x
2. Step 2: Convert to fraction form
   12,462.52/17,191.32 = 7,916.80/x
3. Step 3: Cross multiply
   12,462.52x = 17,191.32 × 7,916.80
4. Step 4: Simplify right side
   12,462.52x = 136,100,242.18
5. Step 5: Solve for x
   x = 136,100,242.18/12,462.52
6. Step 6: Final answer
   x = 10,920.76