Finding the Fourth Proportional to 9,987.46, 13,782.69 and 5,450.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.46 : 13,782.69 = 5,450.15 : x
2. Step 2: Convert to fraction form
   9,987.46/13,782.69 = 5,450.15/x
3. Step 3: Cross multiply
   9,987.46x = 13,782.69 × 5,450.15
4. Step 4: Simplify right side
   9,987.46x = 75,117,762.36
5. Step 5: Solve for x
   x = 75,117,762.36/9,987.46
6. Step 6: Final answer
   x = 7,521.21