Finding the Third Proportional to 486,111.50 and 760,829.50

Step by Step Solution

1. Step 1: Write the proportion equation
   486,111.50 : 760,829.50 = 760,829.50 : x
2. Step 2: Convert to fraction form
   486,111.50/760,829.50 = 760,829.50/x
3. Step 3: Cross multiply
   486,111.50x = 760,829.50 × 760,829.50
4. Step 4: Simplify right side
   486,111.50x = 578,861,528,070.25
5. Step 5: Solve for x
   x = 578,861,528,070.25/486,111.50
6. Step 6: Final answer
   x = 1,190,799.91