Finding the Third Proportional to 155,229 and 339,516.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,229 : 339,516.50 = 339,516.50 : x
2. Step 2: Convert to fraction form
   155,229/339,516.50 = 339,516.50/x
3. Step 3: Cross multiply
   155,229x = 339,516.50 × 339,516.50
4. Step 4: Simplify right side
   155,229x = 115,271,453,772.25
5. Step 5: Solve for x
   x = 115,271,453,772.25/155,229
6. Step 6: Final answer
   x = 742,589.68