Finding the Fourth Proportional to 9,987.53, 13,783.12 and 5,511.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.53 : 13,783.12 = 5,511.56 : x
2. Step 2: Convert to fraction form
   9,987.53/13,783.12 = 5,511.56/x
3. Step 3: Cross multiply
   9,987.53x = 13,783.12 × 5,511.56
4. Step 4: Simplify right side
   9,987.53x = 75,966,410.17
5. Step 5: Solve for x
   x = 75,966,410.17/9,987.53
6. Step 6: Final answer
   x = 7,606.13