Finding the Third Proportional to 2,118.02 and 3,100.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.02 : 3,100.78 = 3,100.78 : x
2. Step 2: Convert to fraction form
   2,118.02/3,100.78 = 3,100.78/x
3. Step 3: Cross multiply
   2,118.02x = 3,100.78 × 3,100.78
4. Step 4: Simplify right side
   2,118.02x = 9,614,844.36
5. Step 5: Solve for x
   x = 9,614,844.36/2,118.02
6. Step 6: Final answer
   x = 4,539.54