Finding the Fourth Proportional to 22,836, 31,518.24 and 12,900

Step by Step Solution

1. Step 1: Write the proportion equation
   22,836 : 31,518.24 = 12,900 : x
2. Step 2: Convert to fraction form
   22,836/31,518.24 = 12,900/x
3. Step 3: Cross multiply
   22,836x = 31,518.24 × 12,900
4. Step 4: Simplify right side
   22,836x = 406,585,296
5. Step 5: Solve for x
   x = 406,585,296/22,836
6. Step 6: Final answer
   x = 17,804.58