Finding the Fourth Proportional to 72,233.06, 99,686.83 and 40,412.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,233.06 : 99,686.83 = 40,412.20 : x
2. Step 2: Convert to fraction form
   72,233.06/99,686.83 = 40,412.20/x
3. Step 3: Cross multiply
   72,233.06x = 99,686.83 × 40,412.20
4. Step 4: Simplify right side
   72,233.06x = 4,028,564,111.33
5. Step 5: Solve for x
   x = 4,028,564,111.33/72,233.06
6. Step 6: Final answer
   x = 55,771.75