Finding the Fourth Proportional to 8,529.37, 12,772.69 and 5,399.93

Step by Step Solution

1. Step 1: Write the proportion equation
   8,529.37 : 12,772.69 = 5,399.93 : x
2. Step 2: Convert to fraction form
   8,529.37/12,772.69 = 5,399.93/x
3. Step 3: Cross multiply
   8,529.37x = 12,772.69 × 5,399.93
4. Step 4: Simplify right side
   8,529.37x = 68,971,650.34
5. Step 5: Solve for x
   x = 68,971,650.34/8,529.37
6. Step 6: Final answer
   x = 8,086.37