Finding the Fourth Proportional to 39,098.72, 58,659 and 12,821.96

Step by Step Solution

1. Step 1: Write the proportion equation
   39,098.72 : 58,659 = 12,821.96 : x
2. Step 2: Convert to fraction form
   39,098.72/58,659 = 12,821.96/x
3. Step 3: Cross multiply
   39,098.72x = 58,659 × 12,821.96
4. Step 4: Simplify right side
   39,098.72x = 752,123,351.64
5. Step 5: Solve for x
   x = 752,123,351.64/39,098.72
6. Step 6: Final answer
   x = 19,236.52