Finding the Fourth Proportional to 22,940.68, 31,667.78 and 19,422.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,940.68 : 31,667.78 = 19,422.12 : x
2. Step 2: Convert to fraction form
   22,940.68/31,667.78 = 19,422.12/x
3. Step 3: Cross multiply
   22,940.68x = 31,667.78 × 19,422.12
4. Step 4: Simplify right side
   22,940.68x = 615,055,423.29
5. Step 5: Solve for x
   x = 615,055,423.29/22,940.68
6. Step 6: Final answer
   x = 26,810.69