Finding the Fourth Proportional to 10,471.15, 15,706.86 and 2,679.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,471.15 : 15,706.86 = 2,679.76 : x
2. Step 2: Convert to fraction form
   10,471.15/15,706.86 = 2,679.76/x
3. Step 3: Cross multiply
   10,471.15x = 15,706.86 × 2,679.76
4. Step 4: Simplify right side
   10,471.15x = 42,090,615.15
5. Step 5: Solve for x
   x = 42,090,615.15/10,471.15
6. Step 6: Final answer
   x = 4,019.67