Finding the Fourth Proportional to 72,119.89, 99,525.31 and 43,456.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,119.89 : 99,525.31 = 43,456.15 : x
2. Step 2: Convert to fraction form
   72,119.89/99,525.31 = 43,456.15/x
3. Step 3: Cross multiply
   72,119.89x = 99,525.31 × 43,456.15
4. Step 4: Simplify right side
   72,119.89x = 4,324,986,800.16
5. Step 5: Solve for x
   x = 4,324,986,800.16/72,119.89
6. Step 6: Final answer
   x = 59,969.40