Finding the Third Proportional to 909,465 and 1,980,391

Step by Step Solution

1. Step 1: Write the proportion equation
   909,465 : 1,980,391 = 1,980,391 : x
2. Step 2: Convert to fraction form
   909,465/1,980,391 = 1,980,391/x
3. Step 3: Cross multiply
   909,465x = 1,980,391 × 1,980,391
4. Step 4: Simplify right side
   909,465x = 3,921,948,512,881
5. Step 5: Solve for x
   x = 3,921,948,512,881/909,465
6. Step 6: Final answer
   x = 4,312,368.82