Finding the Fourth Proportional to 23,390.22, 32,279.67 and 12,780.30

Step by Step Solution

1. Step 1: Write the proportion equation
   23,390.22 : 32,279.67 = 12,780.30 : x
2. Step 2: Convert to fraction form
   23,390.22/32,279.67 = 12,780.30/x
3. Step 3: Cross multiply
   23,390.22x = 32,279.67 × 12,780.30
4. Step 4: Simplify right side
   23,390.22x = 412,543,866.50
5. Step 5: Solve for x
   x = 412,543,866.50/23,390.22
6. Step 6: Final answer
   x = 17,637.45