Finding the Fourth Proportional to 2,610.69, 3,916.65 and 761.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.69 : 3,916.65 = 761.76 : x
2. Step 2: Convert to fraction form
   2,610.69/3,916.65 = 761.76/x
3. Step 3: Cross multiply
   2,610.69x = 3,916.65 × 761.76
4. Step 4: Simplify right side
   2,610.69x = 2,983,547.30
5. Step 5: Solve for x
   x = 2,983,547.30/2,610.69
6. Step 6: Final answer
   x = 1,142.82