Finding the Fourth Proportional to 1,097.46, 1,515.33 and 678.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,097.46 : 1,515.33 = 678.42 : x
2. Step 2: Convert to fraction form
   1,097.46/1,515.33 = 678.42/x
3. Step 3: Cross multiply
   1,097.46x = 1,515.33 × 678.42
4. Step 4: Simplify right side
   1,097.46x = 1,028,030.18
5. Step 5: Solve for x
   x = 1,028,030.18/1,097.46
6. Step 6: Final answer
   x = 936.74