Finding the Fourth Proportional to 9,870.08, 13,622.75 and 5,621.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.08 : 13,622.75 = 5,621.42 : x
2. Step 2: Convert to fraction form
   9,870.08/13,622.75 = 5,621.42/x
3. Step 3: Cross multiply
   9,870.08x = 13,622.75 × 5,621.42
4. Step 4: Simplify right side
   9,870.08x = 76,579,103.08
5. Step 5: Solve for x
   x = 76,579,103.08/9,870.08
6. Step 6: Final answer
   x = 7,758.72