Finding the Third Proportional to 431,679 and 915,961.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,679 : 915,961.50 = 915,961.50 : x
2. Step 2: Convert to fraction form
   431,679/915,961.50 = 915,961.50/x
3. Step 3: Cross multiply
   431,679x = 915,961.50 × 915,961.50
4. Step 4: Simplify right side
   431,679x = 838,985,469,482.25
5. Step 5: Solve for x
   x = 838,985,469,482.25/431,679
6. Step 6: Final answer
   x = 1,943,540.15