Finding the Third Proportional to 917,763 and 1,290,108

Step by Step Solution

1. Step 1: Write the proportion equation
   917,763 : 1,290,108 = 1,290,108 : x
2. Step 2: Convert to fraction form
   917,763/1,290,108 = 1,290,108/x
3. Step 3: Cross multiply
   917,763x = 1,290,108 × 1,290,108
4. Step 4: Simplify right side
   917,763x = 1,664,378,651,664
5. Step 5: Solve for x
   x = 1,664,378,651,664/917,763
6. Step 6: Final answer
   x = 1,813,516.84