Finding the Fourth Proportional to 10,356.46, 15,521.72 and 8,156.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,356.46 : 15,521.72 = 8,156.50 : x
2. Step 2: Convert to fraction form
   10,356.46/15,521.72 = 8,156.50/x
3. Step 3: Cross multiply
   10,356.46x = 15,521.72 × 8,156.50
4. Step 4: Simplify right side
   10,356.46x = 126,602,909.18
5. Step 5: Solve for x
   x = 126,602,909.18/10,356.46
6. Step 6: Final answer
   x = 12,224.54