Finding the Third Proportional to 118,519.50 and 258,342

Step by Step Solution

1. Step 1: Write the proportion equation
   118,519.50 : 258,342 = 258,342 : x
2. Step 2: Convert to fraction form
   118,519.50/258,342 = 258,342/x
3. Step 3: Cross multiply
   118,519.50x = 258,342 × 258,342
4. Step 4: Simplify right side
   118,519.50x = 66,740,588,964
5. Step 5: Solve for x
   x = 66,740,588,964/118,519.50
6. Step 6: Final answer
   x = 563,119.06