Finding the Third Proportional to 1,918.50 and 3,150.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.50 : 3,150.75 = 3,150.75 : x
2. Step 2: Convert to fraction form
   1,918.50/3,150.75 = 3,150.75/x
3. Step 3: Cross multiply
   1,918.50x = 3,150.75 × 3,150.75
4. Step 4: Simplify right side
   1,918.50x = 9,927,225.56
5. Step 5: Solve for x
   x = 9,927,225.56/1,918.50
6. Step 6: Final answer
   x = 5,174.47