Finding the Fourth Proportional to 1,368.63, 1,888.41 and 808.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.63 : 1,888.41 = 808.72 : x
2. Step 2: Convert to fraction form
   1,368.63/1,888.41 = 808.72/x
3. Step 3: Cross multiply
   1,368.63x = 1,888.41 × 808.72
4. Step 4: Simplify right side
   1,368.63x = 1,527,194.94
5. Step 5: Solve for x
   x = 1,527,194.94/1,368.63
6. Step 6: Final answer
   x = 1,115.86