Finding the Fourth Proportional to 105.01, 157.59 and 56.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105.01 : 157.59 = 56.31 : x
2. Step 2: Convert to fraction form
   105.01/157.59 = 56.31/x
3. Step 3: Cross multiply
   105.01x = 157.59 × 56.31
4. Step 4: Simplify right side
   105.01x = 8,873.89
5. Step 5: Solve for x
   x = 8,873.89/105.01
6. Step 6: Final answer
   x = 84.51