Finding the Fourth Proportional to 12,987.97, 17,923.30 and 7,019.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987.97 : 17,923.30 = 7,019.62 : x
2. Step 2: Convert to fraction form
   12,987.97/17,923.30 = 7,019.62/x
3. Step 3: Cross multiply
   12,987.97x = 17,923.30 × 7,019.62
4. Step 4: Simplify right side
   12,987.97x = 125,814,838.55
5. Step 5: Solve for x
   x = 125,814,838.55/12,987.97
6. Step 6: Final answer
   x = 9,687.03