Finding the Third Proportional to 153,870 and 243,441

Step by Step Solution

1. Step 1: Write the proportion equation
   153,870 : 243,441 = 243,441 : x
2. Step 2: Convert to fraction form
   153,870/243,441 = 243,441/x
3. Step 3: Cross multiply
   153,870x = 243,441 × 243,441
4. Step 4: Simplify right side
   153,870x = 59,263,520,481
5. Step 5: Solve for x
   x = 59,263,520,481/153,870
6. Step 6: Final answer
   x = 385,153.18