Finding the Fourth Proportional to 101.34, 139.80 and 76.83

Step by Step Solution

1. Step 1: Write the proportion equation
   101.34 : 139.80 = 76.83 : x
2. Step 2: Convert to fraction form
   101.34/139.80 = 76.83/x
3. Step 3: Cross multiply
   101.34x = 139.80 × 76.83
4. Step 4: Simplify right side
   101.34x = 10,740.83
5. Step 5: Solve for x
   x = 10,740.83/101.34
6. Step 6: Final answer
   x = 105.99