Finding the Fourth Proportional to 22,969.86, 31,696.04 and 12,899.40

Step by Step Solution

1. Step 1: Write the proportion equation
   22,969.86 : 31,696.04 = 12,899.40 : x
2. Step 2: Convert to fraction form
   22,969.86/31,696.04 = 12,899.40/x
3. Step 3: Cross multiply
   22,969.86x = 31,696.04 × 12,899.40
4. Step 4: Simplify right side
   22,969.86x = 408,859,898.38
5. Step 5: Solve for x
   x = 408,859,898.38/22,969.86
6. Step 6: Final answer
   x = 17,799.84