Finding the Third Proportional to 869,018 and 1,272,417

Step by Step Solution

1. Step 1: Write the proportion equation
   869,018 : 1,272,417 = 1,272,417 : x
2. Step 2: Convert to fraction form
   869,018/1,272,417 = 1,272,417/x
3. Step 3: Cross multiply
   869,018x = 1,272,417 × 1,272,417
4. Step 4: Simplify right side
   869,018x = 1,619,045,021,889
5. Step 5: Solve for x
   x = 1,619,045,021,889/869,018
6. Step 6: Final answer
   x = 1,863,074.21