Finding the Fourth Proportional to 30,778.64, 42,494.29 and 19,309.27

Step by Step Solution

1. Step 1: Write the proportion equation
   30,778.64 : 42,494.29 = 19,309.27 : x
2. Step 2: Convert to fraction form
   30,778.64/42,494.29 = 19,309.27/x
3. Step 3: Cross multiply
   30,778.64x = 42,494.29 × 19,309.27
4. Step 4: Simplify right side
   30,778.64x = 820,533,622.52
5. Step 5: Solve for x
   x = 820,533,622.52/30,778.64
6. Step 6: Final answer
   x = 26,659.19