Finding the Fourth Proportional to 100.95, 139.27 and 76.34

Step by Step Solution

1. Step 1: Write the proportion equation
   100.95 : 139.27 = 76.34 : x
2. Step 2: Convert to fraction form
   100.95/139.27 = 76.34/x
3. Step 3: Cross multiply
   100.95x = 139.27 × 76.34
4. Step 4: Simplify right side
   100.95x = 10,631.87
5. Step 5: Solve for x
   x = 10,631.87/100.95
6. Step 6: Final answer
   x = 105.32