Finding the Fourth Proportional to 100.50, 150.71 and 51.72

Step by Step Solution

1. Step 1: Write the proportion equation
   100.50 : 150.71 = 51.72 : x
2. Step 2: Convert to fraction form
   100.50/150.71 = 51.72/x
3. Step 3: Cross multiply
   100.50x = 150.71 × 51.72
4. Step 4: Simplify right side
   100.50x = 7,794.46
5. Step 5: Solve for x
   x = 7,794.46/100.50
6. Step 6: Final answer
   x = 77.56