Finding the Fourth Proportional to 72,015.30, 99,381.18 and 40,184.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72,015.30 : 99,381.18 = 40,184.22 : x
2. Step 2: Convert to fraction form
   72,015.30/99,381.18 = 40,184.22/x
3. Step 3: Cross multiply
   72,015.30x = 99,381.18 × 40,184.22
4. Step 4: Simplify right side
   72,015.30x = 3,993,555,200.98
5. Step 5: Solve for x
   x = 3,993,555,200.98/72,015.30
6. Step 6: Final answer
   x = 55,454.26