Finding the Fourth Proportional to 39,171.57, 58,744.89 and 12,870.24

Step by Step Solution

1. Step 1: Write the proportion equation
   39,171.57 : 58,744.89 = 12,870.24 : x
2. Step 2: Convert to fraction form
   39,171.57/58,744.89 = 12,870.24/x
3. Step 3: Cross multiply
   39,171.57x = 58,744.89 × 12,870.24
4. Step 4: Simplify right side
   39,171.57x = 756,060,833.07
5. Step 5: Solve for x
   x = 756,060,833.07/39,171.57
6. Step 6: Final answer
   x = 19,301.26