Finding the Fourth Proportional to 1,104.50, 1,525.41 and 685.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.50 : 1,525.41 = 685.86 : x
2. Step 2: Convert to fraction form
   1,104.50/1,525.41 = 685.86/x
3. Step 3: Cross multiply
   1,104.50x = 1,525.41 × 685.86
4. Step 4: Simplify right side
   1,104.50x = 1,046,211.98
5. Step 5: Solve for x
   x = 1,046,211.98/1,104.50
6. Step 6: Final answer
   x = 947.22