Finding the Third Proportional to 272,311.50 and 436,905

Step by Step Solution

1. Step 1: Write the proportion equation
   272,311.50 : 436,905 = 436,905 : x
2. Step 2: Convert to fraction form
   272,311.50/436,905 = 436,905/x
3. Step 3: Cross multiply
   272,311.50x = 436,905 × 436,905
4. Step 4: Simplify right side
   272,311.50x = 190,885,979,025
5. Step 5: Solve for x
   x = 190,885,979,025/272,311.50
6. Step 6: Final answer
   x = 700,983.91