Finding the Fourth Proportional to 1,116.73, 1,687.75 and 1,097.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.73 : 1,687.75 = 1,097.56 : x
2. Step 2: Convert to fraction form
   1,116.73/1,687.75 = 1,097.56/x
3. Step 3: Cross multiply
   1,116.73x = 1,687.75 × 1,097.56
4. Step 4: Simplify right side
   1,116.73x = 1,852,406.89
5. Step 5: Solve for x
   x = 1,852,406.89/1,116.73
6. Step 6: Final answer
   x = 1,658.78