Finding the Fourth Proportional to 10,031.27, 13,842.77 and 5,555.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,031.27 : 13,842.77 = 5,555.21 : x
2. Step 2: Convert to fraction form
   10,031.27/13,842.77 = 5,555.21/x
3. Step 3: Cross multiply
   10,031.27x = 13,842.77 × 5,555.21
4. Step 4: Simplify right side
   10,031.27x = 76,899,397.34
5. Step 5: Solve for x
   x = 76,899,397.34/10,031.27
6. Step 6: Final answer
   x = 7,665.97