Finding the Fourth Proportional to 72,978.03, 100,709.64 and 39,444.03

Step by Step Solution

1. Step 1: Write the proportion equation
   72,978.03 : 100,709.64 = 39,444.03 : x
2. Step 2: Convert to fraction form
   72,978.03/100,709.64 = 39,444.03/x
3. Step 3: Cross multiply
   72,978.03x = 100,709.64 × 39,444.03
4. Step 4: Simplify right side
   72,978.03x = 3,972,394,061.45
5. Step 5: Solve for x
   x = 3,972,394,061.45/72,978.03
6. Step 6: Final answer
   x = 54,432.74