Finding the Fourth Proportional to 9,871.65, 13,622.90 and 5,622.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.65 : 13,622.90 = 5,622.53 : x
2. Step 2: Convert to fraction form
   9,871.65/13,622.90 = 5,622.53/x
3. Step 3: Cross multiply
   9,871.65x = 13,622.90 × 5,622.53
4. Step 4: Simplify right side
   9,871.65x = 76,595,067.71
5. Step 5: Solve for x
   x = 76,595,067.71/9,871.65
6. Step 6: Final answer
   x = 7,759.09