Finding the Fourth Proportional to 82.79, 123.98 and 46.70

Step by Step Solution

1. Step 1: Write the proportion equation
   82.79 : 123.98 = 46.70 : x
2. Step 2: Convert to fraction form
   82.79/123.98 = 46.70/x
3. Step 3: Cross multiply
   82.79x = 123.98 × 46.70
4. Step 4: Simplify right side
   82.79x = 5,789.87
5. Step 5: Solve for x
   x = 5,789.87/82.79
6. Step 6: Final answer
   x = 69.93