Finding the Fourth Proportional to 7,620.52, 11,429.82 and 2,688.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,620.52 : 11,429.82 = 2,688.76 : x
2. Step 2: Convert to fraction form
   7,620.52/11,429.82 = 2,688.76/x
3. Step 3: Cross multiply
   7,620.52x = 11,429.82 × 2,688.76
4. Step 4: Simplify right side
   7,620.52x = 30,732,042.82
5. Step 5: Solve for x
   x = 30,732,042.82/7,620.52
6. Step 6: Final answer
   x = 4,032.80