Finding the Fourth Proportional to 10,011.72, 13,815.94 and 5,535.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,011.72 : 13,815.94 = 5,535.51 : x
2. Step 2: Convert to fraction form
   10,011.72/13,815.94 = 5,535.51/x
3. Step 3: Cross multiply
   10,011.72x = 13,815.94 × 5,535.51
4. Step 4: Simplify right side
   10,011.72x = 76,478,253.33
5. Step 5: Solve for x
   x = 76,478,253.33/10,011.72
6. Step 6: Final answer
   x = 7,638.87