Finding the Fourth Proportional to 8,188.56, 12,279.60 and 4,728.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,188.56 : 12,279.60 = 4,728.24 : x
2. Step 2: Convert to fraction form
   8,188.56/12,279.60 = 4,728.24/x
3. Step 3: Cross multiply
   8,188.56x = 12,279.60 × 4,728.24
4. Step 4: Simplify right side
   8,188.56x = 58,060,895.90
5. Step 5: Solve for x
   x = 58,060,895.90/8,188.56
6. Step 6: Final answer
   x = 7,090.49