Finding the Fourth Proportional to 58,672.78, 80,947.21 and 38,540.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,672.78 : 80,947.21 = 38,540.50 : x
2. Step 2: Convert to fraction form
   58,672.78/80,947.21 = 38,540.50/x
3. Step 3: Cross multiply
   58,672.78x = 80,947.21 × 38,540.50
4. Step 4: Simplify right side
   58,672.78x = 3,119,745,947.01
5. Step 5: Solve for x
   x = 3,119,745,947.01/58,672.78
6. Step 6: Final answer
   x = 53,171.95