Finding the Fourth Proportional to 23,645.32, 32,630.14 and 12,890.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,645.32 : 32,630.14 = 12,890.31 : x
2. Step 2: Convert to fraction form
   23,645.32/32,630.14 = 12,890.31/x
3. Step 3: Cross multiply
   23,645.32x = 32,630.14 × 12,890.31
4. Step 4: Simplify right side
   23,645.32x = 420,612,513.69
5. Step 5: Solve for x
   x = 420,612,513.69/23,645.32
6. Step 6: Final answer
   x = 17,788.41