Finding the Third Proportional to 431,578.13 and 907,903.69

Step by Step Solution

1. Step 1: Write the proportion equation
   431,578.13 : 907,903.69 = 907,903.69 : x
2. Step 2: Convert to fraction form
   431,578.13/907,903.69 = 907,903.69/x
3. Step 3: Cross multiply
   431,578.13x = 907,903.69 × 907,903.69
4. Step 4: Simplify right side
   431,578.13x = 824,289,105,776.10
5. Step 5: Solve for x
   x = 824,289,105,776.10/431,578.13
6. Step 6: Final answer
   x = 1,909,941.81