Finding the Third Proportional to 429,315 and 679,645.50

Step by Step Solution

1. Step 1: Write the proportion equation
   429,315 : 679,645.50 = 679,645.50 : x
2. Step 2: Convert to fraction form
   429,315/679,645.50 = 679,645.50/x
3. Step 3: Cross multiply
   429,315x = 679,645.50 × 679,645.50
4. Step 4: Simplify right side
   429,315x = 461,918,005,670.25
5. Step 5: Solve for x
   x = 461,918,005,670.25/429,315
6. Step 6: Final answer
   x = 1,075,941.92