Finding the Fourth Proportional to 71,994.32, 99,352.72 and 40,158.08

Step by Step Solution

1. Step 1: Write the proportion equation
   71,994.32 : 99,352.72 = 40,158.08 : x
2. Step 2: Convert to fraction form
   71,994.32/99,352.72 = 40,158.08/x
3. Step 3: Cross multiply
   71,994.32x = 99,352.72 × 40,158.08
4. Step 4: Simplify right side
   71,994.32x = 3,989,814,477.98
5. Step 5: Solve for x
   x = 3,989,814,477.98/71,994.32
6. Step 6: Final answer
   x = 55,418.46