Finding the Third Proportional to 145,323 and 212,242.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,323 : 212,242.50 = 212,242.50 : x
2. Step 2: Convert to fraction form
   145,323/212,242.50 = 212,242.50/x
3. Step 3: Cross multiply
   145,323x = 212,242.50 × 212,242.50
4. Step 4: Simplify right side
   145,323x = 45,046,878,806.25
5. Step 5: Solve for x
   x = 45,046,878,806.25/145,323
6. Step 6: Final answer
   x = 309,977.63