Finding the Third Proportional to 286,486 and 607,122.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,486 : 607,122.50 = 607,122.50 : x
2. Step 2: Convert to fraction form
   286,486/607,122.50 = 607,122.50/x
3. Step 3: Cross multiply
   286,486x = 607,122.50 × 607,122.50
4. Step 4: Simplify right side
   286,486x = 368,597,730,006.25
5. Step 5: Solve for x
   x = 368,597,730,006.25/286,486
6. Step 6: Final answer
   x = 1,286,616.90