Finding the Fourth Proportional to 2,118.01, 3,177.30 and 1,077.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.01 : 3,177.30 = 1,077.67 : x
2. Step 2: Convert to fraction form
   2,118.01/3,177.30 = 1,077.67/x
3. Step 3: Cross multiply
   2,118.01x = 3,177.30 × 1,077.67
4. Step 4: Simplify right side
   2,118.01x = 3,424,080.89
5. Step 5: Solve for x
   x = 3,424,080.89/2,118.01
6. Step 6: Final answer
   x = 1,616.65