Finding the Fourth Proportional to 72,049.48, 99,426.62 and 40,221.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,049.48 : 99,426.62 = 40,221.34 : x
2. Step 2: Convert to fraction form
   72,049.48/99,426.62 = 40,221.34/x
3. Step 3: Cross multiply
   72,049.48x = 99,426.62 × 40,221.34
4. Step 4: Simplify right side
   72,049.48x = 3,999,071,888.07
5. Step 5: Solve for x
   x = 3,999,071,888.07/72,049.48
6. Step 6: Final answer
   x = 55,504.52