Finding the Fourth Proportional to 39,282.18, 58,925.16 and 12,986.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,282.18 : 58,925.16 = 12,986.34 : x
2. Step 2: Convert to fraction form
   39,282.18/58,925.16 = 12,986.34/x
3. Step 3: Cross multiply
   39,282.18x = 58,925.16 × 12,986.34
4. Step 4: Simplify right side
   39,282.18x = 765,222,162.31
5. Step 5: Solve for x
   x = 765,222,162.31/39,282.18
6. Step 6: Final answer
   x = 19,480.13