Finding the Third Proportional to 140,761 and 218,141

Step by Step Solution

1. Step 1: Write the proportion equation
   140,761 : 218,141 = 218,141 : x
2. Step 2: Convert to fraction form
   140,761/218,141 = 218,141/x
3. Step 3: Cross multiply
   140,761x = 218,141 × 218,141
4. Step 4: Simplify right side
   140,761x = 47,585,495,881
5. Step 5: Solve for x
   x = 47,585,495,881/140,761
6. Step 6: Final answer
   x = 338,058.81