Finding the Fourth Proportional to 100.76, 151.16 and 42.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100.76 : 151.16 = 42.98 : x
2. Step 2: Convert to fraction form
   100.76/151.16 = 42.98/x
3. Step 3: Cross multiply
   100.76x = 151.16 × 42.98
4. Step 4: Simplify right side
   100.76x = 6,495.89
5. Step 5: Solve for x
   x = 6,495.89/100.76
6. Step 6: Final answer
   x = 64.47