Finding the Fourth Proportional to 100.98, 151.50 and 43.18

Step by Step Solution

1. Step 1: Write the proportion equation
   100.98 : 151.50 = 43.18 : x
2. Step 2: Convert to fraction form
   100.98/151.50 = 43.18/x
3. Step 3: Cross multiply
   100.98x = 151.50 × 43.18
4. Step 4: Simplify right side
   100.98x = 6,541.57
5. Step 5: Solve for x
   x = 6,541.57/100.98
6. Step 6: Final answer
   x = 64.78