Finding the Third Proportional to 118,831.50 and 258,156

Step by Step Solution

1. Step 1: Write the proportion equation
   118,831.50 : 258,156 = 258,156 : x
2. Step 2: Convert to fraction form
   118,831.50/258,156 = 258,156/x
3. Step 3: Cross multiply
   118,831.50x = 258,156 × 258,156
4. Step 4: Simplify right side
   118,831.50x = 66,644,520,336
5. Step 5: Solve for x
   x = 66,644,520,336/118,831.50
6. Step 6: Final answer
   x = 560,832.11