Finding the Third Proportional to 219,319 and 455,870

Step by Step Solution

1. Step 1: Write the proportion equation
   219,319 : 455,870 = 455,870 : x
2. Step 2: Convert to fraction form
   219,319/455,870 = 455,870/x
3. Step 3: Cross multiply
   219,319x = 455,870 × 455,870
4. Step 4: Simplify right side
   219,319x = 207,817,456,900
5. Step 5: Solve for x
   x = 207,817,456,900/219,319
6. Step 6: Final answer
   x = 947,557.93