Finding the Fourth Proportional to 22,477.31, 31,021.43 and 12,917.19

Step by Step Solution

1. Step 1: Write the proportion equation
   22,477.31 : 31,021.43 = 12,917.19 : x
2. Step 2: Convert to fraction form
   22,477.31/31,021.43 = 12,917.19/x
3. Step 3: Cross multiply
   22,477.31x = 31,021.43 × 12,917.19
4. Step 4: Simplify right side
   22,477.31x = 400,709,640.80
5. Step 5: Solve for x
   x = 400,709,640.80/22,477.31
6. Step 6: Final answer
   x = 17,827.30