Finding the Fourth Proportional to 8,156.32, 12,124.50 and 7,916.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,156.32 : 12,124.50 = 7,916.86 : x
2. Step 2: Convert to fraction form
   8,156.32/12,124.50 = 7,916.86/x
3. Step 3: Cross multiply
   8,156.32x = 12,124.50 × 7,916.86
4. Step 4: Simplify right side
   8,156.32x = 95,987,969.07
5. Step 5: Solve for x
   x = 95,987,969.07/8,156.32
6. Step 6: Final answer
   x = 11,768.54