Finding the Fourth Proportional to 100.91, 151.27 and 70.47

Step by Step Solution

1. Step 1: Write the proportion equation
   100.91 : 151.27 = 70.47 : x
2. Step 2: Convert to fraction form
   100.91/151.27 = 70.47/x
3. Step 3: Cross multiply
   100.91x = 151.27 × 70.47
4. Step 4: Simplify right side
   100.91x = 10,659.82
5. Step 5: Solve for x
   x = 10,659.82/100.91
6. Step 6: Final answer
   x = 105.63