Finding the Fourth Proportional to 13,287.65, 19,892.59 and 10,488.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,287.65 : 19,892.59 = 10,488.29 : x
2. Step 2: Convert to fraction form
   13,287.65/19,892.59 = 10,488.29/x
3. Step 3: Cross multiply
   13,287.65x = 19,892.59 × 10,488.29
4. Step 4: Simplify right side
   13,287.65x = 208,639,127.09
5. Step 5: Solve for x
   x = 208,639,127.09/13,287.65
6. Step 6: Final answer
   x = 15,701.74