Finding the Fourth Proportional to 2,516.31, 3,774.51 and 872.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,516.31 : 3,774.51 = 872.91 : x
2. Step 2: Convert to fraction form
   2,516.31/3,774.51 = 872.91/x
3. Step 3: Cross multiply
   2,516.31x = 3,774.51 × 872.91
4. Step 4: Simplify right side
   2,516.31x = 3,294,807.52
5. Step 5: Solve for x
   x = 3,294,807.52/2,516.31
6. Step 6: Final answer
   x = 1,309.38