Finding the Third Proportional to 916,784 and 1,991,340

Step by Step Solution

1. Step 1: Write the proportion equation
   916,784 : 1,991,340 = 1,991,340 : x
2. Step 2: Convert to fraction form
   916,784/1,991,340 = 1,991,340/x
3. Step 3: Cross multiply
   916,784x = 1,991,340 × 1,991,340
4. Step 4: Simplify right side
   916,784x = 3,965,434,995,600
5. Step 5: Solve for x
   x = 3,965,434,995,600/916,784
6. Step 6: Final answer
   x = 4,325,375.44