Finding the Third Proportional to 155,928 and 328,156.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,928 : 328,156.50 = 328,156.50 : x
2. Step 2: Convert to fraction form
   155,928/328,156.50 = 328,156.50/x
3. Step 3: Cross multiply
   155,928x = 328,156.50 × 328,156.50
4. Step 4: Simplify right side
   155,928x = 107,686,688,492.25
5. Step 5: Solve for x
   x = 107,686,688,492.25/155,928
6. Step 6: Final answer
   x = 690,618.03