Finding the Fourth Proportional to 12,458.72, 18,677.90 and 5,799.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,458.72 : 18,677.90 = 5,799.39 : x
2. Step 2: Convert to fraction form
   12,458.72/18,677.90 = 5,799.39/x
3. Step 3: Cross multiply
   12,458.72x = 18,677.90 × 5,799.39
4. Step 4: Simplify right side
   12,458.72x = 108,320,426.48
5. Step 5: Solve for x
   x = 108,320,426.48/12,458.72
6. Step 6: Final answer
   x = 8,694.35