Finding the Fourth Proportional to 72,978.50, 100,710.34 and 39,444.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,978.50 : 100,710.34 = 39,444.50 : x
2. Step 2: Convert to fraction form
   72,978.50/100,710.34 = 39,444.50/x
3. Step 3: Cross multiply
   72,978.50x = 100,710.34 × 39,444.50
4. Step 4: Simplify right side
   72,978.50x = 3,972,469,159.29
5. Step 5: Solve for x
   x = 3,972,469,159.29/72,978.50
6. Step 6: Final answer
   x = 54,433.42