Finding the Fourth Proportional to 12,988.82, 17,923.25 and 7,954.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,988.82 : 17,923.25 = 7,954.47 : x
2. Step 2: Convert to fraction form
   12,988.82/17,923.25 = 7,954.47/x
3. Step 3: Cross multiply
   12,988.82x = 17,923.25 × 7,954.47
4. Step 4: Simplify right side
   12,988.82x = 142,569,974.31
5. Step 5: Solve for x
   x = 142,569,974.31/12,988.82
6. Step 6: Final answer
   x = 10,976.36