Finding the Fourth Proportional to 22,890.02, 31,588.08 and 12,818.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,890.02 : 31,588.08 = 12,818.48 : x
2. Step 2: Convert to fraction form
   22,890.02/31,588.08 = 12,818.48/x
3. Step 3: Cross multiply
   22,890.02x = 31,588.08 × 12,818.48
4. Step 4: Simplify right side
   22,890.02x = 404,911,171.72
5. Step 5: Solve for x
   x = 404,911,171.72/22,890.02
6. Step 6: Final answer
   x = 17,689.42