Finding the Fourth Proportional to 101.33, 139.89 and 77.52

Step by Step Solution

1. Step 1: Write the proportion equation
   101.33 : 139.89 = 77.52 : x
2. Step 2: Convert to fraction form
   101.33/139.89 = 77.52/x
3. Step 3: Cross multiply
   101.33x = 139.89 × 77.52
4. Step 4: Simplify right side
   101.33x = 10,843.91
5. Step 5: Solve for x
   x = 10,843.91/101.33
6. Step 6: Final answer
   x = 107.01