Finding the Fourth Proportional to 1,105.95, 1,656.15 and 693.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.95 : 1,656.15 = 693.77 : x
2. Step 2: Convert to fraction form
   1,105.95/1,656.15 = 693.77/x
3. Step 3: Cross multiply
   1,105.95x = 1,656.15 × 693.77
4. Step 4: Simplify right side
   1,105.95x = 1,148,976.30
5. Step 5: Solve for x
   x = 1,148,976.30/1,105.95
6. Step 6: Final answer
   x = 1,038.90