Finding the Fourth Proportional to 12,460.10, 18,693.54 and 5,438.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,460.10 : 18,693.54 = 5,438.79 : x
2. Step 2: Convert to fraction form
   12,460.10/18,693.54 = 5,438.79/x
3. Step 3: Cross multiply
   12,460.10x = 18,693.54 × 5,438.79
4. Step 4: Simplify right side
   12,460.10x = 101,670,238.42
5. Step 5: Solve for x
   x = 101,670,238.42/12,460.10
6. Step 6: Final answer
   x = 8,159.67