Finding the Fourth Proportional to 30,778.82, 42,467.72 and 19,434.68

Step by Step Solution

1. Step 1: Write the proportion equation
   30,778.82 : 42,467.72 = 19,434.68 : x
2. Step 2: Convert to fraction form
   30,778.82/42,467.72 = 19,434.68/x
3. Step 3: Cross multiply
   30,778.82x = 42,467.72 × 19,434.68
4. Step 4: Simplify right side
   30,778.82x = 825,346,548.53
5. Step 5: Solve for x
   x = 825,346,548.53/30,778.82
6. Step 6: Final answer
   x = 26,815.41