Finding the Fourth Proportional to 8,607.76, 12,900.85 and 4,659.01

Step by Step Solution

1. Step 1: Write the proportion equation
   8,607.76 : 12,900.85 = 4,659.01 : x
2. Step 2: Convert to fraction form
   8,607.76/12,900.85 = 4,659.01/x
3. Step 3: Cross multiply
   8,607.76x = 12,900.85 × 4,659.01
4. Step 4: Simplify right side
   8,607.76x = 60,105,189.16
5. Step 5: Solve for x
   x = 60,105,189.16/8,607.76
6. Step 6: Final answer
   x = 6,982.67