Finding the Fourth Proportional to 72.43, 108.42 and 46.70

Step by Step Solution

1. Step 1: Write the proportion equation
   72.43 : 108.42 = 46.70 : x
2. Step 2: Convert to fraction form
   72.43/108.42 = 46.70/x
3. Step 3: Cross multiply
   72.43x = 108.42 × 46.70
4. Step 4: Simplify right side
   72.43x = 5,062.69
5. Step 5: Solve for x
   x = 5,062.69/72.43
6. Step 6: Final answer
   x = 69.90