Finding the Fourth Proportional to 72,909.82, 100,615.56 and 39,375.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,909.82 : 100,615.56 = 39,375.82 : x
2. Step 2: Convert to fraction form
   72,909.82/100,615.56 = 39,375.82/x
3. Step 3: Cross multiply
   72,909.82x = 100,615.56 × 39,375.82
4. Step 4: Simplify right side
   72,909.82x = 3,961,820,179.76
5. Step 5: Solve for x
   x = 3,961,820,179.76/72,909.82
6. Step 6: Final answer
   x = 54,338.64