Finding the Fourth Proportional to 23,388.89, 32,276.30 and 12,778.30

Step by Step Solution

1. Step 1: Write the proportion equation
   23,388.89 : 32,276.30 = 12,778.30 : x
2. Step 2: Convert to fraction form
   23,388.89/32,276.30 = 12,778.30/x
3. Step 3: Cross multiply
   23,388.89x = 32,276.30 × 12,778.30
4. Step 4: Simplify right side
   23,388.89x = 412,436,099.71
5. Step 5: Solve for x
   x = 412,436,099.71/23,388.89
6. Step 6: Final answer
   x = 17,633.84