Finding the Fourth Proportional to 1,158.56, 1,738.38 and 696.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.56 : 1,738.38 = 696.50 : x
2. Step 2: Convert to fraction form
   1,158.56/1,738.38 = 696.50/x
3. Step 3: Cross multiply
   1,158.56x = 1,738.38 × 696.50
4. Step 4: Simplify right side
   1,158.56x = 1,210,781.67
5. Step 5: Solve for x
   x = 1,210,781.67/1,158.56
6. Step 6: Final answer
   x = 1,045.07