Finding the Fourth Proportional to 31,058.44, 42,870.31 and 17,638.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,058.44 : 42,870.31 = 17,638.63 : x
2. Step 2: Convert to fraction form
   31,058.44/42,870.31 = 17,638.63/x
3. Step 3: Cross multiply
   31,058.44x = 42,870.31 × 17,638.63
4. Step 4: Simplify right side
   31,058.44x = 756,173,365.82
5. Step 5: Solve for x
   x = 756,173,365.82/31,058.44
6. Step 6: Final answer
   x = 24,346.80