Finding the Fourth Proportional to 38,665.86, 58,007.43 and 12,372.18

Step by Step Solution

1. Step 1: Write the proportion equation
   38,665.86 : 58,007.43 = 12,372.18 : x
2. Step 2: Convert to fraction form
   38,665.86/58,007.43 = 12,372.18/x
3. Step 3: Cross multiply
   38,665.86x = 58,007.43 × 12,372.18
4. Step 4: Simplify right side
   38,665.86x = 717,678,365.30
5. Step 5: Solve for x
   x = 717,678,365.30/38,665.86
6. Step 6: Final answer
   x = 18,561.03