Finding the Third Proportional to 120,873 and 169,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,873 : 169,915.50 = 169,915.50 : x
2. Step 2: Convert to fraction form
   120,873/169,915.50 = 169,915.50/x
3. Step 3: Cross multiply
   120,873x = 169,915.50 × 169,915.50
4. Step 4: Simplify right side
   120,873x = 28,871,277,140.25
5. Step 5: Solve for x
   x = 28,871,277,140.25/120,873
6. Step 6: Final answer
   x = 238,856.30