Finding the Fourth Proportional to 22,418.76, 30,941.52 and 12,992.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,418.76 : 30,941.52 = 12,992.78 : x
2. Step 2: Convert to fraction form
   22,418.76/30,941.52 = 12,992.78/x
3. Step 3: Cross multiply
   22,418.76x = 30,941.52 × 12,992.78
4. Step 4: Simplify right side
   22,418.76x = 402,016,362.23
5. Step 5: Solve for x
   x = 402,016,362.23/22,418.76
6. Step 6: Final answer
   x = 17,932.14