Finding the Fourth Proportional to 10,079.36, 15,116.48 and 3,920

Step by Step Solution

1. Step 1: Write the proportion equation
   10,079.36 : 15,116.48 = 3,920 : x
2. Step 2: Convert to fraction form
   10,079.36/15,116.48 = 3,920/x
3. Step 3: Cross multiply
   10,079.36x = 15,116.48 × 3,920
4. Step 4: Simplify right side
   10,079.36x = 59,256,601.60
5. Step 5: Solve for x
   x = 59,256,601.60/10,079.36
6. Step 6: Final answer
   x = 5,879.00