Finding the Third Proportional to 128,250 and 282,778.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,250 : 282,778.50 = 282,778.50 : x
2. Step 2: Convert to fraction form
   128,250/282,778.50 = 282,778.50/x
3. Step 3: Cross multiply
   128,250x = 282,778.50 × 282,778.50
4. Step 4: Simplify right side
   128,250x = 79,963,680,062.25
5. Step 5: Solve for x
   x = 79,963,680,062.25/128,250
6. Step 6: Final answer
   x = 623,498.48