Finding the Third Proportional to 153,237 and 243,516

Step by Step Solution

1. Step 1: Write the proportion equation
   153,237 : 243,516 = 243,516 : x
2. Step 2: Convert to fraction form
   153,237/243,516 = 243,516/x
3. Step 3: Cross multiply
   153,237x = 243,516 × 243,516
4. Step 4: Simplify right side
   153,237x = 59,300,042,256
5. Step 5: Solve for x
   x = 59,300,042,256/153,237
6. Step 6: Final answer
   x = 386,982.53