Finding the Fourth Proportional to 72.79, 109.32 and 67.00

Step by Step Solution

1. Step 1: Write the proportion equation
   72.79 : 109.32 = 67.00 : x
2. Step 2: Convert to fraction form
   72.79/109.32 = 67.00/x
3. Step 3: Cross multiply
   72.79x = 109.32 × 67.00
4. Step 4: Simplify right side
   72.79x = 7,323.92
5. Step 5: Solve for x
   x = 7,323.92/72.79
6. Step 6: Final answer
   x = 100.62