Finding the Third Proportional to 355,104 and 478,436.63

Step by Step Solution

1. Step 1: Write the proportion equation
   355,104 : 478,436.63 = 478,436.63 : x
2. Step 2: Convert to fraction form
   355,104/478,436.63 = 478,436.63/x
3. Step 3: Cross multiply
   355,104x = 478,436.63 × 478,436.63
4. Step 4: Simplify right side
   355,104x = 228,901,604,141.39
5. Step 5: Solve for x
   x = 228,901,604,141.39/355,104
6. Step 6: Final answer
   x = 644,604.41