Finding the Fourth Proportional to 1,068.69, 1,602.75 and 678.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.69 : 1,602.75 = 678.12 : x
2. Step 2: Convert to fraction form
   1,068.69/1,602.75 = 678.12/x
3. Step 3: Cross multiply
   1,068.69x = 1,602.75 × 678.12
4. Step 4: Simplify right side
   1,068.69x = 1,086,856.83
5. Step 5: Solve for x
   x = 1,086,856.83/1,068.69
6. Step 6: Final answer
   x = 1,017.00