Finding the Third Proportional to 118,515 and 258,331.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,515 : 258,331.50 = 258,331.50 : x
2. Step 2: Convert to fraction form
   118,515/258,331.50 = 258,331.50/x
3. Step 3: Cross multiply
   118,515x = 258,331.50 × 258,331.50
4. Step 4: Simplify right side
   118,515x = 66,735,163,892.25
5. Step 5: Solve for x
   x = 66,735,163,892.25/118,515
6. Step 6: Final answer
   x = 563,094.66