Finding the Third Proportional to 431,988 and 608,069.25

Step by Step Solution

1. Step 1: Write the proportion equation
   431,988 : 608,069.25 = 608,069.25 : x
2. Step 2: Convert to fraction form
   431,988/608,069.25 = 608,069.25/x
3. Step 3: Cross multiply
   431,988x = 608,069.25 × 608,069.25
4. Step 4: Simplify right side
   431,988x = 369,748,212,795.56
5. Step 5: Solve for x
   x = 369,748,212,795.56/431,988
6. Step 6: Final answer
   x = 855,922.42