Finding the Fourth Proportional to 1,665.31, 2,496.02 and 1,253.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.31 : 2,496.02 = 1,253.12 : x
2. Step 2: Convert to fraction form
   1,665.31/2,496.02 = 1,253.12/x
3. Step 3: Cross multiply
   1,665.31x = 2,496.02 × 1,253.12
4. Step 4: Simplify right side
   1,665.31x = 3,127,807.90
5. Step 5: Solve for x
   x = 3,127,807.90/1,665.31
6. Step 6: Final answer
   x = 1,878.22