Finding the Third Proportional to 144,153 and 315,460.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,153 : 315,460.50 = 315,460.50 : x
2. Step 2: Convert to fraction form
   144,153/315,460.50 = 315,460.50/x
3. Step 3: Cross multiply
   144,153x = 315,460.50 × 315,460.50
4. Step 4: Simplify right side
   144,153x = 99,515,327,060.25
5. Step 5: Solve for x
   x = 99,515,327,060.25/144,153
6. Step 6: Final answer
   x = 690,345.17