Finding the Fourth Proportional to 38,978.74, 58,454.88 and 12,676.96

Step by Step Solution

1. Step 1: Write the proportion equation
   38,978.74 : 58,454.88 = 12,676.96 : x
2. Step 2: Convert to fraction form
   38,978.74/58,454.88 = 12,676.96/x
3. Step 3: Cross multiply
   38,978.74x = 58,454.88 × 12,676.96
4. Step 4: Simplify right side
   38,978.74x = 741,030,175.56
5. Step 5: Solve for x
   x = 741,030,175.56/38,978.74
6. Step 6: Final answer
   x = 19,011.14