Finding the Fourth Proportional to 11,031.72, 15,223.62 and 7,312.68

Step by Step Solution

1. Step 1: Write the proportion equation
   11,031.72 : 15,223.62 = 7,312.68 : x
2. Step 2: Convert to fraction form
   11,031.72/15,223.62 = 7,312.68/x
3. Step 3: Cross multiply
   11,031.72x = 15,223.62 × 7,312.68
4. Step 4: Simplify right side
   11,031.72x = 111,325,461.50
5. Step 5: Solve for x
   x = 111,325,461.50/11,031.72
6. Step 6: Final answer
   x = 10,091.40