Finding the Fourth Proportional to 9,191.63, 13,765.50 and 5,287.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,191.63 : 13,765.50 = 5,287.83 : x
2. Step 2: Convert to fraction form
   9,191.63/13,765.50 = 5,287.83/x
3. Step 3: Cross multiply
   9,191.63x = 13,765.50 × 5,287.83
4. Step 4: Simplify right side
   9,191.63x = 72,789,623.87
5. Step 5: Solve for x
   x = 72,789,623.87/9,191.63
6. Step 6: Final answer
   x = 7,919.12