Finding the Third Proportional to 227,979 and 342,090

Step by Step Solution

1. Step 1: Write the proportion equation
   227,979 : 342,090 = 342,090 : x
2. Step 2: Convert to fraction form
   227,979/342,090 = 342,090/x
3. Step 3: Cross multiply
   227,979x = 342,090 × 342,090
4. Step 4: Simplify right side
   227,979x = 117,025,568,100
5. Step 5: Solve for x
   x = 117,025,568,100/227,979
6. Step 6: Final answer
   x = 513,317.31