Finding the Fourth Proportional to 72,978.76, 100,710.68 and 39,444.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,978.76 : 100,710.68 = 39,444.76 : x
2. Step 2: Convert to fraction form
   72,978.76/100,710.68 = 39,444.76/x
3. Step 3: Cross multiply
   72,978.76x = 100,710.68 × 39,444.76
4. Step 4: Simplify right side
   72,978.76x = 3,972,508,602.04
5. Step 5: Solve for x
   x = 3,972,508,602.04/72,978.76
6. Step 6: Final answer
   x = 54,433.76