Finding the Fourth Proportional to 22,426.04, 30,943.94 and 12,992.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,426.04 : 30,943.94 = 12,992.78 : x
2. Step 2: Convert to fraction form
   22,426.04/30,943.94 = 12,992.78/x
3. Step 3: Cross multiply
   22,426.04x = 30,943.94 × 12,992.78
4. Step 4: Simplify right side
   22,426.04x = 402,047,804.75
5. Step 5: Solve for x
   x = 402,047,804.75/22,426.04
6. Step 6: Final answer
   x = 17,927.72