Finding the Fourth Proportional to 10,005.72, 13,808.73 and 5,530.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,005.72 : 13,808.73 = 5,530.35 : x
2. Step 2: Convert to fraction form
   10,005.72/13,808.73 = 5,530.35/x
3. Step 3: Cross multiply
   10,005.72x = 13,808.73 × 5,530.35
4. Step 4: Simplify right side
   10,005.72x = 76,367,109.96
5. Step 5: Solve for x
   x = 76,367,109.96/10,005.72
6. Step 6: Final answer
   x = 7,632.35