Finding the Fourth Proportional to 72.79, 109.12 and 46.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72.79 : 109.12 = 46.76 : x
2. Step 2: Convert to fraction form
   72.79/109.12 = 46.76/x
3. Step 3: Cross multiply
   72.79x = 109.12 × 46.76
4. Step 4: Simplify right side
   72.79x = 5,102.39
5. Step 5: Solve for x
   x = 5,102.39/72.79
6. Step 6: Final answer
   x = 70.10