Finding the Third Proportional to 321,436 and 761,520

Step by Step Solution

1. Step 1: Write the proportion equation
   321,436 : 761,520 = 761,520 : x
2. Step 2: Convert to fraction form
   321,436/761,520 = 761,520/x
3. Step 3: Cross multiply
   321,436x = 761,520 × 761,520
4. Step 4: Simplify right side
   321,436x = 579,912,710,400
5. Step 5: Solve for x
   x = 579,912,710,400/321,436
6. Step 6: Final answer
   x = 1,804,131.18