Finding the Fourth Proportional to 10,116.27, 15,255.36 and 9,977.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,116.27 : 15,255.36 = 9,977.76 : x
2. Step 2: Convert to fraction form
   10,116.27/15,255.36 = 9,977.76/x
3. Step 3: Cross multiply
   10,116.27x = 15,255.36 × 9,977.76
4. Step 4: Simplify right side
   10,116.27x = 152,214,320.79
5. Step 5: Solve for x
   x = 152,214,320.79/10,116.27
6. Step 6: Final answer
   x = 15,046.49