Finding the Fourth Proportional to 83.15, 124.56 and 47.10

Step by Step Solution

1. Step 1: Write the proportion equation
   83.15 : 124.56 = 47.10 : x
2. Step 2: Convert to fraction form
   83.15/124.56 = 47.10/x
3. Step 3: Cross multiply
   83.15x = 124.56 × 47.10
4. Step 4: Simplify right side
   83.15x = 5,866.78
5. Step 5: Solve for x
   x = 5,866.78/83.15
6. Step 6: Final answer
   x = 70.56