Finding the Third Proportional to 219,218 and 478,152

Step by Step Solution

1. Step 1: Write the proportion equation
   219,218 : 478,152 = 478,152 : x
2. Step 2: Convert to fraction form
   219,218/478,152 = 478,152/x
3. Step 3: Cross multiply
   219,218x = 478,152 × 478,152
4. Step 4: Simplify right side
   219,218x = 228,629,335,104
5. Step 5: Solve for x
   x = 228,629,335,104/219,218
6. Step 6: Final answer
   x = 1,042,931.40