Finding the Third Proportional to 917,219 and 1,389,679.50

Step by Step Solution

1. Step 1: Write the proportion equation
   917,219 : 1,389,679.50 = 1,389,679.50 : x
2. Step 2: Convert to fraction form
   917,219/1,389,679.50 = 1,389,679.50/x
3. Step 3: Cross multiply
   917,219x = 1,389,679.50 × 1,389,679.50
4. Step 4: Simplify right side
   917,219x = 1,931,209,112,720.25
5. Step 5: Solve for x
   x = 1,931,209,112,720.25/917,219
6. Step 6: Final answer
   x = 2,105,504.92