Finding the Third Proportional to 549,803 and 851,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   549,803 : 851,308.50 = 851,308.50 : x
2. Step 2: Convert to fraction form
   549,803/851,308.50 = 851,308.50/x
3. Step 3: Cross multiply
   549,803x = 851,308.50 × 851,308.50
4. Step 4: Simplify right side
   549,803x = 724,726,162,172.25
5. Step 5: Solve for x
   x = 724,726,162,172.25/549,803
6. Step 6: Final answer
   x = 1,318,156.07