Finding the Third Proportional to 219,315 and 478,267.50

Step by Step Solution

1. Step 1: Write the proportion equation
   219,315 : 478,267.50 = 478,267.50 : x
2. Step 2: Convert to fraction form
   219,315/478,267.50 = 478,267.50/x
3. Step 3: Cross multiply
   219,315x = 478,267.50 × 478,267.50
4. Step 4: Simplify right side
   219,315x = 228,739,801,556.25
5. Step 5: Solve for x
   x = 228,739,801,556.25/219,315
6. Step 6: Final answer
   x = 1,042,973.81