Finding the Third Proportional to 192,213 and 286,728.19

Step by Step Solution

1. Step 1: Write the proportion equation
   192,213 : 286,728.19 = 286,728.19 : x
2. Step 2: Convert to fraction form
   192,213/286,728.19 = 286,728.19/x
3. Step 3: Cross multiply
   192,213x = 286,728.19 × 286,728.19
4. Step 4: Simplify right side
   192,213x = 82,213,053,507.04
5. Step 5: Solve for x
   x = 82,213,053,507.04/192,213
6. Step 6: Final answer
   x = 427,718.49