Finding the Fourth Proportional to 67.45, 101.06 and 53.10

Step by Step Solution

1. Step 1: Write the proportion equation
   67.45 : 101.06 = 53.10 : x
2. Step 2: Convert to fraction form
   67.45/101.06 = 53.10/x
3. Step 3: Cross multiply
   67.45x = 101.06 × 53.10
4. Step 4: Simplify right side
   67.45x = 5,365.52
5. Step 5: Solve for x
   x = 5,365.52/67.45
6. Step 6: Final answer
   x = 79.55