Finding the Fourth Proportional to 28,105.52, 42,160.68 and 7,329

Step by Step Solution

1. Step 1: Write the proportion equation
   28,105.52 : 42,160.68 = 7,329 : x
2. Step 2: Convert to fraction form
   28,105.52/42,160.68 = 7,329/x
3. Step 3: Cross multiply
   28,105.52x = 42,160.68 × 7,329
4. Step 4: Simplify right side
   28,105.52x = 308,995,623.72
5. Step 5: Solve for x
   x = 308,995,623.72/28,105.52
6. Step 6: Final answer
   x = 10,994.13