Finding the Fourth Proportional to 22,426.26, 30,947.43 and 12,993

Step by Step Solution

1. Step 1: Write the proportion equation
   22,426.26 : 30,947.43 = 12,993 : x
2. Step 2: Convert to fraction form
   22,426.26/30,947.43 = 12,993/x
3. Step 3: Cross multiply
   22,426.26x = 30,947.43 × 12,993
4. Step 4: Simplify right side
   22,426.26x = 402,099,957.99
5. Step 5: Solve for x
   x = 402,099,957.99/22,426.26
6. Step 6: Final answer
   x = 17,929.87