Finding the Fourth Proportional to 39,870.35, 59,819.31 and 17,699.25

Step by Step Solution

1. Step 1: Write the proportion equation
   39,870.35 : 59,819.31 = 17,699.25 : x
2. Step 2: Convert to fraction form
   39,870.35/59,819.31 = 17,699.25/x
3. Step 3: Cross multiply
   39,870.35x = 59,819.31 × 17,699.25
4. Step 4: Simplify right side
   39,870.35x = 1,058,756,922.52
5. Step 5: Solve for x
   x = 1,058,756,922.52/39,870.35
6. Step 6: Final answer
   x = 26,554.99