Finding the Fourth Proportional to 38,740.86, 58,109.23 and 12,443.55

Step by Step Solution

1. Step 1: Write the proportion equation
   38,740.86 : 58,109.23 = 12,443.55 : x
2. Step 2: Convert to fraction form
   38,740.86/58,109.23 = 12,443.55/x
3. Step 3: Cross multiply
   38,740.86x = 58,109.23 × 12,443.55
4. Step 4: Simplify right side
   38,740.86x = 723,084,906.61
5. Step 5: Solve for x
   x = 723,084,906.61/38,740.86
6. Step 6: Final answer
   x = 18,664.66