Finding the Fourth Proportional to 8,779.05, 12,116.43 and 5,002.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,779.05 : 12,116.43 = 5,002.20 : x
2. Step 2: Convert to fraction form
   8,779.05/12,116.43 = 5,002.20/x
3. Step 3: Cross multiply
   8,779.05x = 12,116.43 × 5,002.20
4. Step 4: Simplify right side
   8,779.05x = 60,608,806.15
5. Step 5: Solve for x
   x = 60,608,806.15/8,779.05
6. Step 6: Final answer
   x = 6,903.80