Finding the Fourth Proportional to 8,593.78, 12,865.16 and 4,686.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,593.78 : 12,865.16 = 4,686.34 : x
2. Step 2: Convert to fraction form
   8,593.78/12,865.16 = 4,686.34/x
3. Step 3: Cross multiply
   8,593.78x = 12,865.16 × 4,686.34
4. Step 4: Simplify right side
   8,593.78x = 60,290,513.91
5. Step 5: Solve for x
   x = 60,290,513.91/8,593.78
6. Step 6: Final answer
   x = 7,015.60