Finding the Fourth Proportional to 1,308.51, 1,802.50 and 1,013.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.51 : 1,802.50 = 1,013.26 : x
2. Step 2: Convert to fraction form
   1,308.51/1,802.50 = 1,013.26/x
3. Step 3: Cross multiply
   1,308.51x = 1,802.50 × 1,013.26
4. Step 4: Simplify right side
   1,308.51x = 1,826,401.15
5. Step 5: Solve for x
   x = 1,826,401.15/1,308.51
6. Step 6: Final answer
   x = 1,395.79