Finding the Fourth Proportional to 19,987.97, 29,981.34 and 5,196.56

Step by Step Solution

1. Step 1: Write the proportion equation
   19,987.97 : 29,981.34 = 5,196.56 : x
2. Step 2: Convert to fraction form
   19,987.97/29,981.34 = 5,196.56/x
3. Step 3: Cross multiply
   19,987.97x = 29,981.34 × 5,196.56
4. Step 4: Simplify right side
   19,987.97x = 155,799,682.28
5. Step 5: Solve for x
   x = 155,799,682.28/19,987.97
6. Step 6: Final answer
   x = 7,794.67