Finding the Fourth Proportional to 10,852.74, 16,248.30 and 7,143.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,852.74 : 16,248.30 = 7,143.78 : x
2. Step 2: Convert to fraction form
   10,852.74/16,248.30 = 7,143.78/x
3. Step 3: Cross multiply
   10,852.74x = 16,248.30 × 7,143.78
4. Step 4: Simplify right side
   10,852.74x = 116,074,280.57
5. Step 5: Solve for x
   x = 116,074,280.57/10,852.74
6. Step 6: Final answer
   x = 10,695.39