Finding the Fourth Proportional to 2,085.54, 3,127.68 and 698.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.54 : 3,127.68 = 698.55 : x
2. Step 2: Convert to fraction form
   2,085.54/3,127.68 = 698.55/x
3. Step 3: Cross multiply
   2,085.54x = 3,127.68 × 698.55
4. Step 4: Simplify right side
   2,085.54x = 2,184,840.86
5. Step 5: Solve for x
   x = 2,184,840.86/2,085.54
6. Step 6: Final answer
   x = 1,047.61