Finding the Third Proportional to 869.75 and 1,870.75

Step by Step Solution

1. Step 1: Write the proportion equation
   869.75 : 1,870.75 = 1,870.75 : x
2. Step 2: Convert to fraction form
   869.75/1,870.75 = 1,870.75/x
3. Step 3: Cross multiply
   869.75x = 1,870.75 × 1,870.75
4. Step 4: Simplify right side
   869.75x = 3,499,705.56
5. Step 5: Solve for x
   x = 3,499,705.56/869.75
6. Step 6: Final answer
   x = 4,023.81