Finding the Fourth Proportional to 11,031.39, 16,514.28 and 7,320.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,031.39 : 16,514.28 = 7,320.78 : x
2. Step 2: Convert to fraction form
   11,031.39/16,514.28 = 7,320.78/x
3. Step 3: Cross multiply
   11,031.39x = 16,514.28 × 7,320.78
4. Step 4: Simplify right side
   11,031.39x = 120,897,410.74
5. Step 5: Solve for x
   x = 120,897,410.74/11,031.39
6. Step 6: Final answer
   x = 10,959.40