Finding the Fourth Proportional to 127.77, 191.72 and 100.63

Step by Step Solution

1. Step 1: Write the proportion equation
   127.77 : 191.72 = 100.63 : x
2. Step 2: Convert to fraction form
   127.77/191.72 = 100.63/x
3. Step 3: Cross multiply
   127.77x = 191.72 × 100.63
4. Step 4: Simplify right side
   127.77x = 19,292.78
5. Step 5: Solve for x
   x = 19,292.78/127.77
6. Step 6: Final answer
   x = 151.00