Finding the Fourth Proportional to 22,491.90, 31,034.60 and 12,935.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,491.90 : 31,034.60 = 12,935.12 : x
2. Step 2: Convert to fraction form
   22,491.90/31,034.60 = 12,935.12/x
3. Step 3: Cross multiply
   22,491.90x = 31,034.60 × 12,935.12
4. Step 4: Simplify right side
   22,491.90x = 401,436,275.15
5. Step 5: Solve for x
   x = 401,436,275.15/22,491.90
6. Step 6: Final answer
   x = 17,848.04