Finding the Third Proportional to 431,191 and 907,065.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,191 : 907,065.50 = 907,065.50 : x
2. Step 2: Convert to fraction form
   431,191/907,065.50 = 907,065.50/x
3. Step 3: Cross multiply
   431,191x = 907,065.50 × 907,065.50
4. Step 4: Simplify right side
   431,191x = 822,767,821,290.25
5. Step 5: Solve for x
   x = 822,767,821,290.25/431,191
6. Step 6: Final answer
   x = 1,908,128.47