Finding the Third Proportional to 88,688 and 188,878

Step by Step Solution

1. Step 1: Write the proportion equation
   88,688 : 188,878 = 188,878 : x
2. Step 2: Convert to fraction form
   88,688/188,878 = 188,878/x
3. Step 3: Cross multiply
   88,688x = 188,878 × 188,878
4. Step 4: Simplify right side
   88,688x = 35,674,898,884
5. Step 5: Solve for x
   x = 35,674,898,884/88,688
6. Step 6: Final answer
   x = 402,251.70