Finding the Fourth Proportional to 15,870.18, 23,802.84 and 5,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870.18 : 23,802.84 = 5,479.50 : x
2. Step 2: Convert to fraction form
   15,870.18/23,802.84 = 5,479.50/x
3. Step 3: Cross multiply
   15,870.18x = 23,802.84 × 5,479.50
4. Step 4: Simplify right side
   15,870.18x = 130,427,661.78
5. Step 5: Solve for x
   x = 130,427,661.78/15,870.18
6. Step 6: Final answer
   x = 8,218.41