Finding the Fourth Proportional to 1,188.00, 1,639.37 and 690.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188.00 : 1,639.37 = 690.56 : x
2. Step 2: Convert to fraction form
   1,188.00/1,639.37 = 690.56/x
3. Step 3: Cross multiply
   1,188.00x = 1,639.37 × 690.56
4. Step 4: Simplify right side
   1,188.00x = 1,132,076.88
5. Step 5: Solve for x
   x = 1,132,076.88/1,188.00
6. Step 6: Final answer
   x = 952.93