Finding the Fourth Proportional to 8,499.69, 12,749.58 and 2,656.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,499.69 : 12,749.58 = 2,656.80 : x
2. Step 2: Convert to fraction form
   8,499.69/12,749.58 = 2,656.80/x
3. Step 3: Cross multiply
   8,499.69x = 12,749.58 × 2,656.80
4. Step 4: Simplify right side
   8,499.69x = 33,873,084.14
5. Step 5: Solve for x
   x = 33,873,084.14/8,499.69
6. Step 6: Final answer
   x = 3,985.21