Finding the Fourth Proportional to 72,066.21, 99,444.83 and 40,229.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72,066.21 : 99,444.83 = 40,229.25 : x
2. Step 2: Convert to fraction form
   72,066.21/99,444.83 = 40,229.25/x
3. Step 3: Cross multiply
   72,066.21x = 99,444.83 × 40,229.25
4. Step 4: Simplify right side
   72,066.21x = 4,000,590,726.13
5. Step 5: Solve for x
   x = 4,000,590,726.13/72,066.21
6. Step 6: Final answer
   x = 55,512.71