Finding the Fourth Proportional to 72,415.21, 108,395.61 and 49,793.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,415.21 : 108,395.61 = 49,793.89 : x
2. Step 2: Convert to fraction form
   72,415.21/108,395.61 = 49,793.89/x
3. Step 3: Cross multiply
   72,415.21x = 108,395.61 × 49,793.89
4. Step 4: Simplify right side
   72,415.21x = 5,397,438,289.88
5. Step 5: Solve for x
   x = 5,397,438,289.88/72,415.21
6. Step 6: Final answer
   x = 74,534.59