Finding the Fourth Proportional to 71,971.56, 99,398.20 and 54,792.54

Step by Step Solution

1. Step 1: Write the proportion equation
   71,971.56 : 99,398.20 = 54,792.54 : x
2. Step 2: Convert to fraction form
   71,971.56/99,398.20 = 54,792.54/x
3. Step 3: Cross multiply
   71,971.56x = 99,398.20 × 54,792.54
4. Step 4: Simplify right side
   71,971.56x = 5,446,279,849.43
5. Step 5: Solve for x
   x = 5,446,279,849.43/71,971.56
6. Step 6: Final answer
   x = 75,672.67