Finding the Third Proportional to 305,259 and 671,419.50

Step by Step Solution

1. Step 1: Write the proportion equation
   305,259 : 671,419.50 = 671,419.50 : x
2. Step 2: Convert to fraction form
   305,259/671,419.50 = 671,419.50/x
3. Step 3: Cross multiply
   305,259x = 671,419.50 × 671,419.50
4. Step 4: Simplify right side
   305,259x = 450,804,144,980.25
5. Step 5: Solve for x
   x = 450,804,144,980.25/305,259
6. Step 6: Final answer
   x = 1,476,792.31