Finding the Fourth Proportional to 72,065.72, 99,400.68 and 49,406.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,065.72 : 99,400.68 = 49,406.74 : x
2. Step 2: Convert to fraction form
   72,065.72/99,400.68 = 49,406.74/x
3. Step 3: Cross multiply
   72,065.72x = 99,400.68 × 49,406.74
4. Step 4: Simplify right side
   72,065.72x = 4,911,063,552.58
5. Step 5: Solve for x
   x = 4,911,063,552.58/72,065.72
6. Step 6: Final answer
   x = 68,147.01