Finding the Third Proportional to 118,181.50 and 259,323.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,181.50 : 259,323.50 = 259,323.50 : x
2. Step 2: Convert to fraction form
   118,181.50/259,323.50 = 259,323.50/x
3. Step 3: Cross multiply
   118,181.50x = 259,323.50 × 259,323.50
4. Step 4: Simplify right side
   118,181.50x = 67,248,677,652.25
5. Step 5: Solve for x
   x = 67,248,677,652.25/118,181.50
6. Step 6: Final answer
   x = 569,028.80