Finding the Fourth Proportional to 1,155.55, 1,729.06 and 693.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.55 : 1,729.06 = 693.61 : x
2. Step 2: Convert to fraction form
   1,155.55/1,729.06 = 693.61/x
3. Step 3: Cross multiply
   1,155.55x = 1,729.06 × 693.61
4. Step 4: Simplify right side
   1,155.55x = 1,199,282.93
5. Step 5: Solve for x
   x = 1,199,282.93/1,155.55
6. Step 6: Final answer
   x = 1,037.85