Finding the Fourth Proportional to 2,610.93, 3,915.47 and 761.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.93 : 3,915.47 = 761.57 : x
2. Step 2: Convert to fraction form
   2,610.93/3,915.47 = 761.57/x
3. Step 3: Cross multiply
   2,610.93x = 3,915.47 × 761.57
4. Step 4: Simplify right side
   2,610.93x = 2,981,881.10
5. Step 5: Solve for x
   x = 2,981,881.10/2,610.93
6. Step 6: Final answer
   x = 1,142.08