Finding the Fourth Proportional to 2,465.31, 3,699.05 and 1,311.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,465.31 : 3,699.05 = 1,311.87 : x
2. Step 2: Convert to fraction form
   2,465.31/3,699.05 = 1,311.87/x
3. Step 3: Cross multiply
   2,465.31x = 3,699.05 × 1,311.87
4. Step 4: Simplify right side
   2,465.31x = 4,852,666.16
5. Step 5: Solve for x
   x = 4,852,666.16/2,465.31
6. Step 6: Final answer
   x = 1,968.38