Finding the Fourth Proportional to 39,273.94, 58,921.89 and 12,997.18

Step by Step Solution

1. Step 1: Write the proportion equation
   39,273.94 : 58,921.89 = 12,997.18 : x
2. Step 2: Convert to fraction form
   39,273.94/58,921.89 = 12,997.18/x
3. Step 3: Cross multiply
   39,273.94x = 58,921.89 × 12,997.18
4. Step 4: Simplify right side
   39,273.94x = 765,818,410.27
5. Step 5: Solve for x
   x = 765,818,410.27/39,273.94
6. Step 6: Final answer
   x = 19,499.40