Finding the Third Proportional to 42,181 and 85,574

Step by Step Solution

1. Step 1: Write the proportion equation
   42,181 : 85,574 = 85,574 : x
2. Step 2: Convert to fraction form
   42,181/85,574 = 85,574/x
3. Step 3: Cross multiply
   42,181x = 85,574 × 85,574
4. Step 4: Simplify right side
   42,181x = 7,322,909,476
5. Step 5: Solve for x
   x = 7,322,909,476/42,181
6. Step 6: Final answer
   x = 173,606.82