Finding the Fourth Proportional to 39,279.53, 58,928.52 and 12,984.27

Step by Step Solution

1. Step 1: Write the proportion equation
   39,279.53 : 58,928.52 = 12,984.27 : x
2. Step 2: Convert to fraction form
   39,279.53/58,928.52 = 12,984.27/x
3. Step 3: Cross multiply
   39,279.53x = 58,928.52 × 12,984.27
4. Step 4: Simplify right side
   39,279.53x = 765,143,814.38
5. Step 5: Solve for x
   x = 765,143,814.38/39,279.53
6. Step 6: Final answer
   x = 19,479.45