Finding the Fourth Proportional to 72.92, 109.37 and 42.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72.92 : 109.37 = 42.50 : x
2. Step 2: Convert to fraction form
   72.92/109.37 = 42.50/x
3. Step 3: Cross multiply
   72.92x = 109.37 × 42.50
4. Step 4: Simplify right side
   72.92x = 4,648.23
5. Step 5: Solve for x
   x = 4,648.23/72.92
6. Step 6: Final answer
   x = 63.74