Finding the Third Proportional to 429,036 and 642,726

Step by Step Solution

1. Step 1: Write the proportion equation
   429,036 : 642,726 = 642,726 : x
2. Step 2: Convert to fraction form
   429,036/642,726 = 642,726/x
3. Step 3: Cross multiply
   429,036x = 642,726 × 642,726
4. Step 4: Simplify right side
   429,036x = 413,096,711,076
5. Step 5: Solve for x
   x = 413,096,711,076/429,036
6. Step 6: Final answer
   x = 962,848.60