Finding the Fourth Proportional to 1,085.70, 1,498.72 and 692.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.70 : 1,498.72 = 692.96 : x
2. Step 2: Convert to fraction form
   1,085.70/1,498.72 = 692.96/x
3. Step 3: Cross multiply
   1,085.70x = 1,498.72 × 692.96
4. Step 4: Simplify right side
   1,085.70x = 1,038,543.79
5. Step 5: Solve for x
   x = 1,038,543.79/1,085.70
6. Step 6: Final answer
   x = 956.57