Finding the Fourth Proportional to 10,931.46, 15,105.27 and 7,782.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.46 : 15,105.27 = 7,782.18 : x
2. Step 2: Convert to fraction form
   10,931.46/15,105.27 = 7,782.18/x
3. Step 3: Cross multiply
   10,931.46x = 15,105.27 × 7,782.18
4. Step 4: Simplify right side
   10,931.46x = 117,551,930.09
5. Step 5: Solve for x
   x = 117,551,930.09/10,931.46
6. Step 6: Final answer
   x = 10,753.54