Finding the Third Proportional to 761,876 and 1,638,412

Step by Step Solution

1. Step 1: Write the proportion equation
   761,876 : 1,638,412 = 1,638,412 : x
2. Step 2: Convert to fraction form
   761,876/1,638,412 = 1,638,412/x
3. Step 3: Cross multiply
   761,876x = 1,638,412 × 1,638,412
4. Step 4: Simplify right side
   761,876x = 2,684,393,881,744
5. Step 5: Solve for x
   x = 2,684,393,881,744/761,876
6. Step 6: Final answer
   x = 3,523,399.98