Finding the Fourth Proportional to 72.48, 109.34 and 70.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72.48 : 109.34 = 70.35 : x
2. Step 2: Convert to fraction form
   72.48/109.34 = 70.35/x
3. Step 3: Cross multiply
   72.48x = 109.34 × 70.35
4. Step 4: Simplify right side
   72.48x = 7,691.72
5. Step 5: Solve for x
   x = 7,691.72/72.48
6. Step 6: Final answer
   x = 106.12