Finding the Fourth Proportional to 22,801.80, 34,147.12 and 12,911.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,801.80 : 34,147.12 = 12,911.10 : x
2. Step 2: Convert to fraction form
   22,801.80/34,147.12 = 12,911.10/x
3. Step 3: Cross multiply
   22,801.80x = 34,147.12 × 12,911.10
4. Step 4: Simplify right side
   22,801.80x = 440,876,744.91
5. Step 5: Solve for x
   x = 440,876,744.91/22,801.80
6. Step 6: Final answer
   x = 19,335.17