Finding the Third Proportional to 388,818 and 609,147

Step by Step Solution

1. Step 1: Write the proportion equation
   388,818 : 609,147 = 609,147 : x
2. Step 2: Convert to fraction form
   388,818/609,147 = 609,147/x
3. Step 3: Cross multiply
   388,818x = 609,147 × 609,147
4. Step 4: Simplify right side
   388,818x = 371,060,067,609
5. Step 5: Solve for x
   x = 371,060,067,609/388,818
6. Step 6: Final answer
   x = 954,328.42