Finding the Fourth Proportional to 1,918.50, 2,647.53 and 1,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.50 : 2,647.53 = 1,090.50 : x
2. Step 2: Convert to fraction form
   1,918.50/2,647.53 = 1,090.50/x
3. Step 3: Cross multiply
   1,918.50x = 2,647.53 × 1,090.50
4. Step 4: Simplify right side
   1,918.50x = 2,887,131.47
5. Step 5: Solve for x
   x = 2,887,131.47/1,918.50
6. Step 6: Final answer
   x = 1,504.89