Finding the Fourth Proportional to 22,710, 31,339.80 and 12,774

Step by Step Solution

1. Step 1: Write the proportion equation
   22,710 : 31,339.80 = 12,774 : x
2. Step 2: Convert to fraction form
   22,710/31,339.80 = 12,774/x
3. Step 3: Cross multiply
   22,710x = 31,339.80 × 12,774
4. Step 4: Simplify right side
   22,710x = 400,334,605.20
5. Step 5: Solve for x
   x = 400,334,605.20/22,710
6. Step 6: Final answer
   x = 17,628.12