Finding the Third Proportional to 355,209.50 and 760,962.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,209.50 : 760,962.50 = 760,962.50 : x
2. Step 2: Convert to fraction form
   355,209.50/760,962.50 = 760,962.50/x
3. Step 3: Cross multiply
   355,209.50x = 760,962.50 × 760,962.50
4. Step 4: Simplify right side
   355,209.50x = 579,063,926,406.25
5. Step 5: Solve for x
   x = 579,063,926,406.25/355,209.50
6. Step 6: Final answer
   x = 1,630,203.94