Finding the Fourth Proportional to 22,891.10, 31,592.76 and 12,820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,891.10 : 31,592.76 = 12,820.10 : x
2. Step 2: Convert to fraction form
   22,891.10/31,592.76 = 12,820.10/x
3. Step 3: Cross multiply
   22,891.10x = 31,592.76 × 12,820.10
4. Step 4: Simplify right side
   22,891.10x = 405,022,342.48
5. Step 5: Solve for x
   x = 405,022,342.48/22,891.10
6. Step 6: Final answer
   x = 17,693.44