Finding the Fourth Proportional to 100.77, 151.17 and 28.63

Step by Step Solution

1. Step 1: Write the proportion equation
   100.77 : 151.17 = 28.63 : x
2. Step 2: Convert to fraction form
   100.77/151.17 = 28.63/x
3. Step 3: Cross multiply
   100.77x = 151.17 × 28.63
4. Step 4: Simplify right side
   100.77x = 4,327.10
5. Step 5: Solve for x
   x = 4,327.10/100.77
6. Step 6: Final answer
   x = 42.94