Finding the Third Proportional to 418,456 and 915,158

Step by Step Solution

1. Step 1: Write the proportion equation
   418,456 : 915,158 = 915,158 : x
2. Step 2: Convert to fraction form
   418,456/915,158 = 915,158/x
3. Step 3: Cross multiply
   418,456x = 915,158 × 915,158
4. Step 4: Simplify right side
   418,456x = 837,514,164,964
5. Step 5: Solve for x
   x = 837,514,164,964/418,456
6. Step 6: Final answer
   x = 2,001,439.02