Finding the Third Proportional to 89,312 and 187,816

Step by Step Solution

1. Step 1: Write the proportion equation
   89,312 : 187,816 = 187,816 : x
2. Step 2: Convert to fraction form
   89,312/187,816 = 187,816/x
3. Step 3: Cross multiply
   89,312x = 187,816 × 187,816
4. Step 4: Simplify right side
   89,312x = 35,274,849,856
5. Step 5: Solve for x
   x = 35,274,849,856/89,312
6. Step 6: Final answer
   x = 394,962.04