Finding the Fourth Proportional to 8,782.08, 12,129.12 and 5,982.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,782.08 : 12,129.12 = 5,982.72 : x
2. Step 2: Convert to fraction form
   8,782.08/12,129.12 = 5,982.72/x
3. Step 3: Cross multiply
   8,782.08x = 12,129.12 × 5,982.72
4. Step 4: Simplify right side
   8,782.08x = 72,565,128.81
5. Step 5: Solve for x
   x = 72,565,128.81/8,782.08
6. Step 6: Final answer
   x = 8,262.86