Finding the Third Proportional to 136,074 and 216,140

Step by Step Solution

1. Step 1: Write the proportion equation
   136,074 : 216,140 = 216,140 : x
2. Step 2: Convert to fraction form
   136,074/216,140 = 216,140/x
3. Step 3: Cross multiply
   136,074x = 216,140 × 216,140
4. Step 4: Simplify right side
   136,074x = 46,716,499,600
5. Step 5: Solve for x
   x = 46,716,499,600/136,074
6. Step 6: Final answer
   x = 343,316.87