Finding the Third Proportional to 145,422 and 213,343.88

Step by Step Solution

1. Step 1: Write the proportion equation
   145,422 : 213,343.88 = 213,343.88 : x
2. Step 2: Convert to fraction form
   145,422/213,343.88 = 213,343.88/x
3. Step 3: Cross multiply
   145,422x = 213,343.88 × 213,343.88
4. Step 4: Simplify right side
   145,422x = 45,515,609,000.02
5. Step 5: Solve for x
   x = 45,515,609,000.02/145,422
6. Step 6: Final answer
   x = 312,989.84