Finding the Third Proportional to 155,916 and 243,000

Step by Step Solution

1. Step 1: Write the proportion equation
   155,916 : 243,000 = 243,000 : x
2. Step 2: Convert to fraction form
   155,916/243,000 = 243,000/x
3. Step 3: Cross multiply
   155,916x = 243,000 × 243,000
4. Step 4: Simplify right side
   155,916x = 59,049,000,000
5. Step 5: Solve for x
   x = 59,049,000,000/155,916
6. Step 6: Final answer
   x = 378,723.16