Finding the Fourth Proportional to 22,339.22, 30,830.59 and 12,780.00

Step by Step Solution

1. Step 1: Write the proportion equation
   22,339.22 : 30,830.59 = 12,780.00 : x
2. Step 2: Convert to fraction form
   22,339.22/30,830.59 = 12,780.00/x
3. Step 3: Cross multiply
   22,339.22x = 30,830.59 × 12,780.00
4. Step 4: Simplify right side
   22,339.22x = 394,014,722.15
5. Step 5: Solve for x
   x = 394,014,722.15/22,339.22
6. Step 6: Final answer
   x = 17,637.80