Finding the Fourth Proportional to 105.34, 157.98 and 54.01

Step by Step Solution

1. Step 1: Write the proportion equation
   105.34 : 157.98 = 54.01 : x
2. Step 2: Convert to fraction form
   105.34/157.98 = 54.01/x
3. Step 3: Cross multiply
   105.34x = 157.98 × 54.01
4. Step 4: Simplify right side
   105.34x = 8,532.50
5. Step 5: Solve for x
   x = 8,532.50/105.34
6. Step 6: Final answer
   x = 81.00