Finding the Fourth Proportional to 91,096, 136,644 and 28,766.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,096 : 136,644 = 28,766.50 : x
2. Step 2: Convert to fraction form
   91,096/136,644 = 28,766.50/x
3. Step 3: Cross multiply
   91,096x = 136,644 × 28,766.50
4. Step 4: Simplify right side
   91,096x = 3,930,769,626
5. Step 5: Solve for x
   x = 3,930,769,626/91,096
6. Step 6: Final answer
   x = 43,149.75