Finding the Fourth Proportional to 8,501.78, 12,753.32 and 2,658.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,501.78 : 12,753.32 = 2,658.38 : x
2. Step 2: Convert to fraction form
   8,501.78/12,753.32 = 2,658.38/x
3. Step 3: Cross multiply
   8,501.78x = 12,753.32 × 2,658.38
4. Step 4: Simplify right side
   8,501.78x = 33,903,093.76
5. Step 5: Solve for x
   x = 33,903,093.76/8,501.78
6. Step 6: Final answer
   x = 3,987.76