Finding the Fourth Proportional to 127.90, 190.72 and 117.10

Step by Step Solution

1. Step 1: Write the proportion equation
   127.90 : 190.72 = 117.10 : x
2. Step 2: Convert to fraction form
   127.90/190.72 = 117.10/x
3. Step 3: Cross multiply
   127.90x = 190.72 × 117.10
4. Step 4: Simplify right side
   127.90x = 22,333.31
5. Step 5: Solve for x
   x = 22,333.31/127.90
6. Step 6: Final answer
   x = 174.62