Finding the Fourth Proportional to 12,317.50, 18,478.68 and 5,392

Step by Step Solution

1. Step 1: Write the proportion equation
   12,317.50 : 18,478.68 = 5,392 : x
2. Step 2: Convert to fraction form
   12,317.50/18,478.68 = 5,392/x
3. Step 3: Cross multiply
   12,317.50x = 18,478.68 × 5,392
4. Step 4: Simplify right side
   12,317.50x = 99,637,042.56
5. Step 5: Solve for x
   x = 99,637,042.56/12,317.50
6. Step 6: Final answer
   x = 8,089.06