Finding the Fourth Proportional to 8,307.60, 12,459.96 and 2,760.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,307.60 : 12,459.96 = 2,760.72 : x
2. Step 2: Convert to fraction form
   8,307.60/12,459.96 = 2,760.72/x
3. Step 3: Cross multiply
   8,307.60x = 12,459.96 × 2,760.72
4. Step 4: Simplify right side
   8,307.60x = 34,398,460.77
5. Step 5: Solve for x
   x = 34,398,460.77/8,307.60
6. Step 6: Final answer
   x = 4,140.60