Finding the Fourth Proportional to 72,221.69, 99,690.98 and 49,635.45

Step by Step Solution

1. Step 1: Write the proportion equation
   72,221.69 : 99,690.98 = 49,635.45 : x
2. Step 2: Convert to fraction form
   72,221.69/99,690.98 = 49,635.45/x
3. Step 3: Cross multiply
   72,221.69x = 99,690.98 × 49,635.45
4. Step 4: Simplify right side
   72,221.69x = 4,948,206,405.06
5. Step 5: Solve for x
   x = 4,948,206,405.06/72,221.69
6. Step 6: Final answer
   x = 68,514.14