Finding the Fourth Proportional to 23,068.57, 31,834.71 and 13,990.90

Step by Step Solution

1. Step 1: Write the proportion equation
   23,068.57 : 31,834.71 = 13,990.90 : x
2. Step 2: Convert to fraction form
   23,068.57/31,834.71 = 13,990.90/x
3. Step 3: Cross multiply
   23,068.57x = 31,834.71 × 13,990.90
4. Step 4: Simplify right side
   23,068.57x = 445,396,244.14
5. Step 5: Solve for x
   x = 445,396,244.14/23,068.57
6. Step 6: Final answer
   x = 19,307.49