Finding the Fourth Proportional to 1,309.98, 1,808.55 and 1,164.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,309.98 : 1,808.55 = 1,164.18 : x
2. Step 2: Convert to fraction form
   1,309.98/1,808.55 = 1,164.18/x
3. Step 3: Cross multiply
   1,309.98x = 1,808.55 × 1,164.18
4. Step 4: Simplify right side
   1,309.98x = 2,105,477.74
5. Step 5: Solve for x
   x = 2,105,477.74/1,309.98
6. Step 6: Final answer
   x = 1,607.26