Finding the Fourth Proportional to 127.23, 175.59 and 78.09

Step by Step Solution

1. Step 1: Write the proportion equation
   127.23 : 175.59 = 78.09 : x
2. Step 2: Convert to fraction form
   127.23/175.59 = 78.09/x
3. Step 3: Cross multiply
   127.23x = 175.59 × 78.09
4. Step 4: Simplify right side
   127.23x = 13,711.82
5. Step 5: Solve for x
   x = 13,711.82/127.23
6. Step 6: Final answer
   x = 107.77