Finding the Fourth Proportional to 72,439.03, 99,965.46 and 40,607.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72,439.03 : 99,965.46 = 40,607.25 : x
2. Step 2: Convert to fraction form
   72,439.03/99,965.46 = 40,607.25/x
3. Step 3: Cross multiply
   72,439.03x = 99,965.46 × 40,607.25
4. Step 4: Simplify right side
   72,439.03x = 4,059,322,425.59
5. Step 5: Solve for x
   x = 4,059,322,425.59/72,439.03
6. Step 6: Final answer
   x = 56,037.78