Finding the Fourth Proportional to 22,308.51, 30,785.70 and 12,877.08

Step by Step Solution

1. Step 1: Write the proportion equation
   22,308.51 : 30,785.70 = 12,877.08 : x
2. Step 2: Convert to fraction form
   22,308.51/30,785.70 = 12,877.08/x
3. Step 3: Cross multiply
   22,308.51x = 30,785.70 × 12,877.08
4. Step 4: Simplify right side
   22,308.51x = 396,429,921.76
5. Step 5: Solve for x
   x = 396,429,921.76/22,308.51
6. Step 6: Final answer
   x = 17,770.35