Finding the Fourth Proportional to 100.56, 150.29 and 71.55

Step by Step Solution

1. Step 1: Write the proportion equation
   100.56 : 150.29 = 71.55 : x
2. Step 2: Convert to fraction form
   100.56/150.29 = 71.55/x
3. Step 3: Cross multiply
   100.56x = 150.29 × 71.55
4. Step 4: Simplify right side
   100.56x = 10,752.89
5. Step 5: Solve for x
   x = 10,752.89/100.56
6. Step 6: Final answer
   x = 106.93