Finding the Third Proportional to 420,172 and 604,012

Step by Step Solution

1. Step 1: Write the proportion equation
   420,172 : 604,012 = 604,012 : x
2. Step 2: Convert to fraction form
   420,172/604,012 = 604,012/x
3. Step 3: Cross multiply
   420,172x = 604,012 × 604,012
4. Step 4: Simplify right side
   420,172x = 364,830,496,144
5. Step 5: Solve for x
   x = 364,830,496,144/420,172
6. Step 6: Final answer
   x = 868,288.45