Finding the Fourth Proportional to 1,368.10, 1,887.88 and 808.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.10 : 1,887.88 = 808.54 : x
2. Step 2: Convert to fraction form
   1,368.10/1,887.88 = 808.54/x
3. Step 3: Cross multiply
   1,368.10x = 1,887.88 × 808.54
4. Step 4: Simplify right side
   1,368.10x = 1,526,426.50
5. Step 5: Solve for x
   x = 1,526,426.50/1,368.10
6. Step 6: Final answer
   x = 1,115.73