Finding the Fourth Proportional to 10,649.10, 15,976.41 and 5,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,649.10 : 15,976.41 = 5,106.72 : x
2. Step 2: Convert to fraction form
   10,649.10/15,976.41 = 5,106.72/x
3. Step 3: Cross multiply
   10,649.10x = 15,976.41 × 5,106.72
4. Step 4: Simplify right side
   10,649.10x = 81,587,052.48
5. Step 5: Solve for x
   x = 81,587,052.48/10,649.10
6. Step 6: Final answer
   x = 7,661.40