Finding the Third Proportional to 285,000 and 609,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,000 : 609,820.50 = 609,820.50 : x
2. Step 2: Convert to fraction form
   285,000/609,820.50 = 609,820.50/x
3. Step 3: Cross multiply
   285,000x = 609,820.50 × 609,820.50
4. Step 4: Simplify right side
   285,000x = 371,881,042,220.25
5. Step 5: Solve for x
   x = 371,881,042,220.25/285,000
6. Step 6: Final answer
   x = 1,304,845.76