Finding the Third Proportional to 149,878.50 and 326,190

Step by Step Solution

1. Step 1: Write the proportion equation
   149,878.50 : 326,190 = 326,190 : x
2. Step 2: Convert to fraction form
   149,878.50/326,190 = 326,190/x
3. Step 3: Cross multiply
   149,878.50x = 326,190 × 326,190
4. Step 4: Simplify right side
   149,878.50x = 106,399,916,100
5. Step 5: Solve for x
   x = 106,399,916,100/149,878.50
6. Step 6: Final answer
   x = 709,907.80