Finding the Fourth Proportional to 71,968.56, 99,394.06 and 54,789.54

Step by Step Solution

1. Step 1: Write the proportion equation
   71,968.56 : 99,394.06 = 54,789.54 : x
2. Step 2: Convert to fraction form
   71,968.56/99,394.06 = 54,789.54/x
3. Step 3: Cross multiply
   71,968.56x = 99,394.06 × 54,789.54
4. Step 4: Simplify right side
   71,968.56x = 5,445,754,826.13
5. Step 5: Solve for x
   x = 5,445,754,826.13/71,968.56
6. Step 6: Final answer
   x = 75,668.53