Finding the Fourth Proportional to 22,213.97, 30,655.31 and 12,784.37

Step by Step Solution

1. Step 1: Write the proportion equation
   22,213.97 : 30,655.31 = 12,784.37 : x
2. Step 2: Convert to fraction form
   22,213.97/30,655.31 = 12,784.37/x
3. Step 3: Cross multiply
   22,213.97x = 30,655.31 × 12,784.37
4. Step 4: Simplify right side
   22,213.97x = 391,908,825.50
5. Step 5: Solve for x
   x = 391,908,825.50/22,213.97
6. Step 6: Final answer
   x = 17,642.45