Finding the Fourth Proportional to 72,323.28, 99,809.82 and 40,490.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,323.28 : 99,809.82 = 40,490.28 : x
2. Step 2: Convert to fraction form
   72,323.28/99,809.82 = 40,490.28/x
3. Step 3: Cross multiply
   72,323.28x = 99,809.82 × 40,490.28
4. Step 4: Simplify right side
   72,323.28x = 4,041,327,558.55
5. Step 5: Solve for x
   x = 4,041,327,558.55/72,323.28
6. Step 6: Final answer
   x = 55,878.65