Finding the Third Proportional to 20,730 and 53,158

Step by Step Solution

1. Step 1: Write the proportion equation
   20,730 : 53,158 = 53,158 : x
2. Step 2: Convert to fraction form
   20,730/53,158 = 53,158/x
3. Step 3: Cross multiply
   20,730x = 53,158 × 53,158
4. Step 4: Simplify right side
   20,730x = 2,825,772,964
5. Step 5: Solve for x
   x = 2,825,772,964/20,730
6. Step 6: Final answer
   x = 136,313.22