Finding the Third Proportional to 149,719.50 and 328,143.50

Step by Step Solution

1. Step 1: Write the proportion equation
   149,719.50 : 328,143.50 = 328,143.50 : x
2. Step 2: Convert to fraction form
   149,719.50/328,143.50 = 328,143.50/x
3. Step 3: Cross multiply
   149,719.50x = 328,143.50 × 328,143.50
4. Step 4: Simplify right side
   149,719.50x = 107,678,156,592.25
5. Step 5: Solve for x
   x = 107,678,156,592.25/149,719.50
6. Step 6: Final answer
   x = 719,199.28