Finding the Third Proportional to 149,898 and 319,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   149,898 : 319,216.50 = 319,216.50 : x
2. Step 2: Convert to fraction form
   149,898/319,216.50 = 319,216.50/x
3. Step 3: Cross multiply
   149,898x = 319,216.50 × 319,216.50
4. Step 4: Simplify right side
   149,898x = 101,899,173,872.25
5. Step 5: Solve for x
   x = 101,899,173,872.25/149,898
6. Step 6: Final answer
   x = 679,790.08