Finding the Fourth Proportional to 9,990.54, 13,787.55 and 5,514.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.54 : 13,787.55 = 5,514.27 : x
2. Step 2: Convert to fraction form
   9,990.54/13,787.55 = 5,514.27/x
3. Step 3: Cross multiply
   9,990.54x = 13,787.55 × 5,514.27
4. Step 4: Simplify right side
   9,990.54x = 76,028,273.34
5. Step 5: Solve for x
   x = 76,028,273.34/9,990.54
6. Step 6: Final answer
   x = 7,610.03