Finding the Fourth Proportional to 127.33, 175.71 and 78.20

Step by Step Solution

1. Step 1: Write the proportion equation
   127.33 : 175.71 = 78.20 : x
2. Step 2: Convert to fraction form
   127.33/175.71 = 78.20/x
3. Step 3: Cross multiply
   127.33x = 175.71 × 78.20
4. Step 4: Simplify right side
   127.33x = 13,740.52
5. Step 5: Solve for x
   x = 13,740.52/127.33
6. Step 6: Final answer
   x = 107.91