Finding the Fourth Proportional to 22,308.64, 30,788.60 and 12,877

Step by Step Solution

1. Step 1: Write the proportion equation
   22,308.64 : 30,788.60 = 12,877 : x
2. Step 2: Convert to fraction form
   22,308.64/30,788.60 = 12,877/x
3. Step 3: Cross multiply
   22,308.64x = 30,788.60 × 12,877
4. Step 4: Simplify right side
   22,308.64x = 396,464,802.20
5. Step 5: Solve for x
   x = 396,464,802.20/22,308.64
6. Step 6: Final answer
   x = 17,771.81