Finding the Fourth Proportional to 83.50, 115.30 and 69.83

Step by Step Solution

1. Step 1: Write the proportion equation
   83.50 : 115.30 = 69.83 : x
2. Step 2: Convert to fraction form
   83.50/115.30 = 69.83/x
3. Step 3: Cross multiply
   83.50x = 115.30 × 69.83
4. Step 4: Simplify right side
   83.50x = 8,051.15
5. Step 5: Solve for x
   x = 8,051.15/83.50
6. Step 6: Final answer
   x = 96.42