Finding the Fourth Proportional to 22,981.17, 31,710.56 and 12,907.68

Step by Step Solution

1. Step 1: Write the proportion equation
   22,981.17 : 31,710.56 = 12,907.68 : x
2. Step 2: Convert to fraction form
   22,981.17/31,710.56 = 12,907.68/x
3. Step 3: Cross multiply
   22,981.17x = 31,710.56 × 12,907.68
4. Step 4: Simplify right side
   22,981.17x = 409,309,761.10
5. Step 5: Solve for x
   x = 409,309,761.10/22,981.17
6. Step 6: Final answer
   x = 17,810.66