Finding the Third Proportional to 140,899 and 286,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,899 : 286,718.50 = 286,718.50 : x
2. Step 2: Convert to fraction form
   140,899/286,718.50 = 286,718.50/x
3. Step 3: Cross multiply
   140,899x = 286,718.50 × 286,718.50
4. Step 4: Simplify right side
   140,899x = 82,207,498,242.25
5. Step 5: Solve for x
   x = 82,207,498,242.25/140,899
6. Step 6: Final answer
   x = 583,449.83