Finding the Third Proportional to 89,100 and 186,840

Step by Step Solution

1. Step 1: Write the proportion equation
   89,100 : 186,840 = 186,840 : x
2. Step 2: Convert to fraction form
   89,100/186,840 = 186,840/x
3. Step 3: Cross multiply
   89,100x = 186,840 × 186,840
4. Step 4: Simplify right side
   89,100x = 34,909,185,600
5. Step 5: Solve for x
   x = 34,909,185,600/89,100
6. Step 6: Final answer
   x = 391,797.82