Finding the Fourth Proportional to 22,913, 31,621.86 and 12,843.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,913 : 31,621.86 = 12,843.80 : x
2. Step 2: Convert to fraction form
   22,913/31,621.86 = 12,843.80/x
3. Step 3: Cross multiply
   22,913x = 31,621.86 × 12,843.80
4. Step 4: Simplify right side
   22,913x = 406,144,845.47
5. Step 5: Solve for x
   x = 406,144,845.47/22,913
6. Step 6: Final answer
   x = 17,725.52