Finding the Third Proportional to 917,764 and 1,290,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   917,764 : 1,290,109.50 = 1,290,109.50 : x
2. Step 2: Convert to fraction form
   917,764/1,290,109.50 = 1,290,109.50/x
3. Step 3: Cross multiply
   917,764x = 1,290,109.50 × 1,290,109.50
4. Step 4: Simplify right side
   917,764x = 1,664,382,521,990.25
5. Step 5: Solve for x
   x = 1,664,382,521,990.25/917,764
6. Step 6: Final answer
   x = 1,813,519.08