Finding the Third Proportional to 42,878 and 88,990

Step by Step Solution

1. Step 1: Write the proportion equation
   42,878 : 88,990 = 88,990 : x
2. Step 2: Convert to fraction form
   42,878/88,990 = 88,990/x
3. Step 3: Cross multiply
   42,878x = 88,990 × 88,990
4. Step 4: Simplify right side
   42,878x = 7,919,220,100
5. Step 5: Solve for x
   x = 7,919,220,100/42,878
6. Step 6: Final answer
   x = 184,691.92