Finding the Fourth Proportional to 39,018.30, 58,521.51 and 12,723

Step by Step Solution

1. Step 1: Write the proportion equation
   39,018.30 : 58,521.51 = 12,723 : x
2. Step 2: Convert to fraction form
   39,018.30/58,521.51 = 12,723/x
3. Step 3: Cross multiply
   39,018.30x = 58,521.51 × 12,723
4. Step 4: Simplify right side
   39,018.30x = 744,569,171.73
5. Step 5: Solve for x
   x = 744,569,171.73/39,018.30
6. Step 6: Final answer
   x = 19,082.56