Finding the Fourth Proportional to 1,160.05, 1,740.51 and 698.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.05 : 1,740.51 = 698.15 : x
2. Step 2: Convert to fraction form
   1,160.05/1,740.51 = 698.15/x
3. Step 3: Cross multiply
   1,160.05x = 1,740.51 × 698.15
4. Step 4: Simplify right side
   1,160.05x = 1,215,141.41
5. Step 5: Solve for x
   x = 1,215,141.41/1,160.05
6. Step 6: Final answer
   x = 1,047.49