Finding the Fourth Proportional to 10,156.25, 15,234.35 and 2,761.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,156.25 : 15,234.35 = 2,761.78 : x
2. Step 2: Convert to fraction form
   10,156.25/15,234.35 = 2,761.78/x
3. Step 3: Cross multiply
   10,156.25x = 15,234.35 × 2,761.78
4. Step 4: Simplify right side
   10,156.25x = 42,073,871.25
5. Step 5: Solve for x
   x = 42,073,871.25/10,156.25
6. Step 6: Final answer
   x = 4,142.66