Finding the Third Proportional to 134,107.50 and 287,686.50

Step by Step Solution

1. Step 1: Write the proportion equation
   134,107.50 : 287,686.50 = 287,686.50 : x
2. Step 2: Convert to fraction form
   134,107.50/287,686.50 = 287,686.50/x
3. Step 3: Cross multiply
   134,107.50x = 287,686.50 × 287,686.50
4. Step 4: Simplify right side
   134,107.50x = 82,763,522,282.25
5. Step 5: Solve for x
   x = 82,763,522,282.25/134,107.50
6. Step 6: Final answer
   x = 617,143.13