Finding the Fourth Proportional to 8,839.72, 12,199.98 and 5,705.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,839.72 : 12,199.98 = 5,705.02 : x
2. Step 2: Convert to fraction form
   8,839.72/12,199.98 = 5,705.02/x
3. Step 3: Cross multiply
   8,839.72x = 12,199.98 × 5,705.02
4. Step 4: Simplify right side
   8,839.72x = 69,601,129.90
5. Step 5: Solve for x
   x = 69,601,129.90/8,839.72
6. Step 6: Final answer
   x = 7,873.68