Finding the Third Proportional to 251,405 and 549,809.38

Step by Step Solution

1. Step 1: Write the proportion equation
   251,405 : 549,809.38 = 549,809.38 : x
2. Step 2: Convert to fraction form
   251,405/549,809.38 = 549,809.38/x
3. Step 3: Cross multiply
   251,405x = 549,809.38 × 549,809.38
4. Step 4: Simplify right side
   251,405x = 302,290,348,837.89
5. Step 5: Solve for x
   x = 302,290,348,837.89/251,405
6. Step 6: Final answer
   x = 1,202,403.89