Finding the Fourth Proportional to 72,432.89, 108,680.55 and 39,176.37

Step by Step Solution

1. Step 1: Write the proportion equation
   72,432.89 : 108,680.55 = 39,176.37 : x
2. Step 2: Convert to fraction form
   72,432.89/108,680.55 = 39,176.37/x
3. Step 3: Cross multiply
   72,432.89x = 108,680.55 × 39,176.37
4. Step 4: Simplify right side
   72,432.89x = 4,257,709,291.69
5. Step 5: Solve for x
   x = 4,257,709,291.69/72,432.89
6. Step 6: Final answer
   x = 58,781.44