Finding the Third Proportional to 117,508.50 and 258,345

Step by Step Solution

1. Step 1: Write the proportion equation
   117,508.50 : 258,345 = 258,345 : x
2. Step 2: Convert to fraction form
   117,508.50/258,345 = 258,345/x
3. Step 3: Cross multiply
   117,508.50x = 258,345 × 258,345
4. Step 4: Simplify right side
   117,508.50x = 66,742,139,025
5. Step 5: Solve for x
   x = 66,742,139,025/117,508.50
6. Step 6: Final answer
   x = 567,977.12