Finding the Fourth Proportional to 100.69, 151.13 and 42.94

Step by Step Solution

1. Step 1: Write the proportion equation
   100.69 : 151.13 = 42.94 : x
2. Step 2: Convert to fraction form
   100.69/151.13 = 42.94/x
3. Step 3: Cross multiply
   100.69x = 151.13 × 42.94
4. Step 4: Simplify right side
   100.69x = 6,489.82
5. Step 5: Solve for x
   x = 6,489.82/100.69
6. Step 6: Final answer
   x = 64.46