Finding the Third Proportional to 152,990 and 215,062

Step by Step Solution

1. Step 1: Write the proportion equation
   152,990 : 215,062 = 215,062 : x
2. Step 2: Convert to fraction form
   152,990/215,062 = 215,062/x
3. Step 3: Cross multiply
   152,990x = 215,062 × 215,062
4. Step 4: Simplify right side
   152,990x = 46,251,663,844
5. Step 5: Solve for x
   x = 46,251,663,844/152,990
6. Step 6: Final answer
   x = 302,318.22