Finding the Fourth Proportional to 127.63, 176.15 and 72.37

Step by Step Solution

1. Step 1: Write the proportion equation
   127.63 : 176.15 = 72.37 : x
2. Step 2: Convert to fraction form
   127.63/176.15 = 72.37/x
3. Step 3: Cross multiply
   127.63x = 176.15 × 72.37
4. Step 4: Simplify right side
   127.63x = 12,747.98
5. Step 5: Solve for x
   x = 12,747.98/127.63
6. Step 6: Final answer
   x = 99.89