Finding the Fourth Proportional to 72.51, 109.29 and 67.55

Step by Step Solution

1. Step 1: Write the proportion equation
   72.51 : 109.29 = 67.55 : x
2. Step 2: Convert to fraction form
   72.51/109.29 = 67.55/x
3. Step 3: Cross multiply
   72.51x = 109.29 × 67.55
4. Step 4: Simplify right side
   72.51x = 7,382.25
5. Step 5: Solve for x
   x = 7,382.25/72.51
6. Step 6: Final answer
   x = 101.82