Finding the Third Proportional to 917,784 and 1,988,091

Step by Step Solution

1. Step 1: Write the proportion equation
   917,784 : 1,988,091 = 1,988,091 : x
2. Step 2: Convert to fraction form
   917,784/1,988,091 = 1,988,091/x
3. Step 3: Cross multiply
   917,784x = 1,988,091 × 1,988,091
4. Step 4: Simplify right side
   917,784x = 3,952,505,824,281
5. Step 5: Solve for x
   x = 3,952,505,824,281/917,784
6. Step 6: Final answer
   x = 4,306,575.21