Finding the Third Proportional to 521,645 and 1,142,920

Step by Step Solution

1. Step 1: Write the proportion equation
   521,645 : 1,142,920 = 1,142,920 : x
2. Step 2: Convert to fraction form
   521,645/1,142,920 = 1,142,920/x
3. Step 3: Cross multiply
   521,645x = 1,142,920 × 1,142,920
4. Step 4: Simplify right side
   521,645x = 1,306,266,126,400
5. Step 5: Solve for x
   x = 1,306,266,126,400/521,645
6. Step 6: Final answer
   x = 2,504,128.53