Finding the Fourth Proportional to 9,987.17, 13,782.15 and 5,510.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.17 : 13,782.15 = 5,510.84 : x
2. Step 2: Convert to fraction form
   9,987.17/13,782.15 = 5,510.84/x
3. Step 3: Cross multiply
   9,987.17x = 13,782.15 × 5,510.84
4. Step 4: Simplify right side
   9,987.17x = 75,951,154.60
5. Step 5: Solve for x
   x = 75,951,154.60/9,987.17
6. Step 6: Final answer
   x = 7,604.88