Finding the Third Proportional to 485,636 and 760,153.50

Step by Step Solution

1. Step 1: Write the proportion equation
   485,636 : 760,153.50 = 760,153.50 : x
2. Step 2: Convert to fraction form
   485,636/760,153.50 = 760,153.50/x
3. Step 3: Cross multiply
   485,636x = 760,153.50 × 760,153.50
4. Step 4: Simplify right side
   485,636x = 577,833,343,562.25
5. Step 5: Solve for x
   x = 577,833,343,562.25/485,636
6. Step 6: Final answer
   x = 1,189,848.66