Finding the Fourth Proportional to 22,746, 31,389.80 and 12,810

Step by Step Solution

1. Step 1: Write the proportion equation
   22,746 : 31,389.80 = 12,810 : x
2. Step 2: Convert to fraction form
   22,746/31,389.80 = 12,810/x
3. Step 3: Cross multiply
   22,746x = 31,389.80 × 12,810
4. Step 4: Simplify right side
   22,746x = 402,103,338
5. Step 5: Solve for x
   x = 402,103,338/22,746
6. Step 6: Final answer
   x = 17,677.98