Finding the Fourth Proportional to 39,288.50, 58,926.98 and 12,993.62

Step by Step Solution

1. Step 1: Write the proportion equation
   39,288.50 : 58,926.98 = 12,993.62 : x
2. Step 2: Convert to fraction form
   39,288.50/58,926.98 = 12,993.62/x
3. Step 3: Cross multiply
   39,288.50x = 58,926.98 × 12,993.62
4. Step 4: Simplify right side
   39,288.50x = 765,674,523.72
5. Step 5: Solve for x
   x = 765,674,523.72/39,288.50
6. Step 6: Final answer
   x = 19,488.52