Finding the Fourth Proportional to 10,912.57, 15,061.31 and 6,436.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,912.57 : 15,061.31 = 6,436.06 : x
2. Step 2: Convert to fraction form
   10,912.57/15,061.31 = 6,436.06/x
3. Step 3: Cross multiply
   10,912.57x = 15,061.31 × 6,436.06
4. Step 4: Simplify right side
   10,912.57x = 96,935,494.84
5. Step 5: Solve for x
   x = 96,935,494.84/10,912.57
6. Step 6: Final answer
   x = 8,882.92