Finding the Fourth Proportional to 42,726.88, 64,092.45 and 17,764.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,726.88 : 64,092.45 = 17,764.30 : x
2. Step 2: Convert to fraction form
   42,726.88/64,092.45 = 17,764.30/x
3. Step 3: Cross multiply
   42,726.88x = 64,092.45 × 17,764.30
4. Step 4: Simplify right side
   42,726.88x = 1,138,557,509.54
5. Step 5: Solve for x
   x = 1,138,557,509.54/42,726.88
6. Step 6: Final answer
   x = 26,647.34