Finding the Fourth Proportional to 38,978.07, 58,473.24 and 12,676.69

Step by Step Solution

1. Step 1: Write the proportion equation
   38,978.07 : 58,473.24 = 12,676.69 : x
2. Step 2: Convert to fraction form
   38,978.07/58,473.24 = 12,676.69/x
3. Step 3: Cross multiply
   38,978.07x = 58,473.24 × 12,676.69
4. Step 4: Simplify right side
   38,978.07x = 741,247,136.78
5. Step 5: Solve for x
   x = 741,247,136.78/38,978.07
6. Step 6: Final answer
   x = 19,017.03