Finding the Third Proportional to 499,473 and 811,492.50

Step by Step Solution

1. Step 1: Write the proportion equation
   499,473 : 811,492.50 = 811,492.50 : x
2. Step 2: Convert to fraction form
   499,473/811,492.50 = 811,492.50/x
3. Step 3: Cross multiply
   499,473x = 811,492.50 × 811,492.50
4. Step 4: Simplify right side
   499,473x = 658,520,077,556.25
5. Step 5: Solve for x
   x = 658,520,077,556.25/499,473
6. Step 6: Final answer
   x = 1,318,429.78