Finding the Fourth Proportional to 9,690.90, 13,371.83 and 5,711.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,690.90 : 13,371.83 = 5,711.48 : x
2. Step 2: Convert to fraction form
   9,690.90/13,371.83 = 5,711.48/x
3. Step 3: Cross multiply
   9,690.90x = 13,371.83 × 5,711.48
4. Step 4: Simplify right side
   9,690.90x = 76,372,844.19
5. Step 5: Solve for x
   x = 76,372,844.19/9,690.90
6. Step 6: Final answer
   x = 7,880.88