Finding the Fourth Proportional to 13,982.65, 19,291.71 and 7,931.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,982.65 : 19,291.71 = 7,931.89 : x
2. Step 2: Convert to fraction form
   13,982.65/19,291.71 = 7,931.89/x
3. Step 3: Cross multiply
   13,982.65x = 19,291.71 × 7,931.89
4. Step 4: Simplify right side
   13,982.65x = 153,019,681.97
5. Step 5: Solve for x
   x = 153,019,681.97/13,982.65
6. Step 6: Final answer
   x = 10,943.54