Finding the Fourth Proportional to 8,789.62, 12,122.83 and 5,646.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.62 : 12,122.83 = 5,646.10 : x
2. Step 2: Convert to fraction form
   8,789.62/12,122.83 = 5,646.10/x
3. Step 3: Cross multiply
   8,789.62x = 12,122.83 × 5,646.10
4. Step 4: Simplify right side
   8,789.62x = 68,446,710.46
5. Step 5: Solve for x
   x = 68,446,710.46/8,789.62
6. Step 6: Final answer
   x = 7,787.22