Finding the Fourth Proportional to 83.25, 124.89 and 47.18

Step by Step Solution

1. Step 1: Write the proportion equation
   83.25 : 124.89 = 47.18 : x
2. Step 2: Convert to fraction form
   83.25/124.89 = 47.18/x
3. Step 3: Cross multiply
   83.25x = 124.89 × 47.18
4. Step 4: Simplify right side
   83.25x = 5,892.31
5. Step 5: Solve for x
   x = 5,892.31/83.25
6. Step 6: Final answer
   x = 70.78