Finding the Fourth Proportional to 1,108.29, 1,528.80 and 693.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.29 : 1,528.80 = 693.57 : x
2. Step 2: Convert to fraction form
   1,108.29/1,528.80 = 693.57/x
3. Step 3: Cross multiply
   1,108.29x = 1,528.80 × 693.57
4. Step 4: Simplify right side
   1,108.29x = 1,060,329.82
5. Step 5: Solve for x
   x = 1,060,329.82/1,108.29
6. Step 6: Final answer
   x = 956.73