Finding the Fourth Proportional to 1,200.59, 1,656.71 and 696.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.59 : 1,656.71 = 696.06 : x
2. Step 2: Convert to fraction form
   1,200.59/1,656.71 = 696.06/x
3. Step 3: Cross multiply
   1,200.59x = 1,656.71 × 696.06
4. Step 4: Simplify right side
   1,200.59x = 1,153,166.08
5. Step 5: Solve for x
   x = 1,153,166.08/1,200.59
6. Step 6: Final answer
   x = 960.50