Finding the Fourth Proportional to 9,987.00, 13,781.75 and 5,510.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.00 : 13,781.75 = 5,510.63 : x
2. Step 2: Convert to fraction form
   9,987.00/13,781.75 = 5,510.63/x
3. Step 3: Cross multiply
   9,987.00x = 13,781.75 × 5,510.63
4. Step 4: Simplify right side
   9,987.00x = 75,946,131.90
5. Step 5: Solve for x
   x = 75,946,131.90/9,987.00
6. Step 6: Final answer
   x = 7,604.50