Finding the Fourth Proportional to 72,243.80, 99,696.72 and 40,412.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,243.80 : 99,696.72 = 40,412.72 : x
2. Step 2: Convert to fraction form
   72,243.80/99,696.72 = 40,412.72/x
3. Step 3: Cross multiply
   72,243.80x = 99,696.72 × 40,412.72
4. Step 4: Simplify right side
   72,243.80x = 4,029,016,031.07
5. Step 5: Solve for x
   x = 4,029,016,031.07/72,243.80
6. Step 6: Final answer
   x = 55,769.71