Finding the Fourth Proportional to 72,145.24, 99,558.52 and 40,314.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,145.24 : 99,558.52 = 40,314.40 : x
2. Step 2: Convert to fraction form
   72,145.24/99,558.52 = 40,314.40/x
3. Step 3: Cross multiply
   72,145.24x = 99,558.52 × 40,314.40
4. Step 4: Simplify right side
   72,145.24x = 4,013,642,348.37
5. Step 5: Solve for x
   x = 4,013,642,348.37/72,145.24
6. Step 6: Final answer
   x = 55,632.81