Finding the Fourth Proportional to 8,600.78, 12,897.83 and 5,097.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,600.78 : 12,897.83 = 5,097.94 : x
2. Step 2: Convert to fraction form
   8,600.78/12,897.83 = 5,097.94/x
3. Step 3: Cross multiply
   8,600.78x = 12,897.83 × 5,097.94
4. Step 4: Simplify right side
   8,600.78x = 65,752,343.97
5. Step 5: Solve for x
   x = 65,752,343.97/8,600.78
6. Step 6: Final answer
   x = 7,644.93