Finding the Fourth Proportional to 72,716.88, 109,009.71 and 50,540.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72,716.88 : 109,009.71 = 50,540.70 : x
2. Step 2: Convert to fraction form
   72,716.88/109,009.71 = 50,540.70/x
3. Step 3: Cross multiply
   72,716.88x = 109,009.71 × 50,540.70
4. Step 4: Simplify right side
   72,716.88x = 5,509,427,050.20
5. Step 5: Solve for x
   x = 5,509,427,050.20/72,716.88
6. Step 6: Final answer
   x = 75,765.45