Finding the Fourth Proportional to 72,053.28, 99,436.68 and 40,222.08

Step by Step Solution

1. Step 1: Write the proportion equation
   72,053.28 : 99,436.68 = 40,222.08 : x
2. Step 2: Convert to fraction form
   72,053.28/99,436.68 = 40,222.08/x
3. Step 3: Cross multiply
   72,053.28x = 99,436.68 × 40,222.08
4. Step 4: Simplify right side
   72,053.28x = 3,999,550,097.89
5. Step 5: Solve for x
   x = 3,999,550,097.89/72,053.28
6. Step 6: Final answer
   x = 55,508.23