Finding the Third Proportional to 152,988 and 215,060

Step by Step Solution

1. Step 1: Write the proportion equation
   152,988 : 215,060 = 215,060 : x
2. Step 2: Convert to fraction form
   152,988/215,060 = 215,060/x
3. Step 3: Cross multiply
   152,988x = 215,060 × 215,060
4. Step 4: Simplify right side
   152,988x = 46,250,803,600
5. Step 5: Solve for x
   x = 46,250,803,600/152,988
6. Step 6: Final answer
   x = 302,316.55