Finding the Fourth Proportional to 72.60, 108.94 and 42.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72.60 : 108.94 = 42.16 : x
2. Step 2: Convert to fraction form
   72.60/108.94 = 42.16/x
3. Step 3: Cross multiply
   72.60x = 108.94 × 42.16
4. Step 4: Simplify right side
   72.60x = 4,592.91
5. Step 5: Solve for x
   x = 4,592.91/72.60
6. Step 6: Final answer
   x = 63.26