Finding the Fourth Proportional to 42,761.67, 64,157.78 and 19,067.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,761.67 : 64,157.78 = 19,067.09 : x
2. Step 2: Convert to fraction form
   42,761.67/64,157.78 = 19,067.09/x
3. Step 3: Cross multiply
   42,761.67x = 64,157.78 × 19,067.09
4. Step 4: Simplify right side
   42,761.67x = 1,223,302,165.46
5. Step 5: Solve for x
   x = 1,223,302,165.46/42,761.67
6. Step 6: Final answer
   x = 28,607.45