Finding the Fourth Proportional to 12,808.61, 19,215.33 and 5,788.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,808.61 : 19,215.33 = 5,788.54 : x
2. Step 2: Convert to fraction form
   12,808.61/19,215.33 = 5,788.54/x
3. Step 3: Cross multiply
   12,808.61x = 19,215.33 × 5,788.54
4. Step 4: Simplify right side
   12,808.61x = 111,228,706.32
5. Step 5: Solve for x
   x = 111,228,706.32/12,808.61
6. Step 6: Final answer
   x = 8,683.90