Finding the Third Proportional to 478,855 and 714,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   478,855 : 714,129.50 = 714,129.50 : x
2. Step 2: Convert to fraction form
   478,855/714,129.50 = 714,129.50/x
3. Step 3: Cross multiply
   478,855x = 714,129.50 × 714,129.50
4. Step 4: Simplify right side
   478,855x = 509,980,942,770.25
5. Step 5: Solve for x
   x = 509,980,942,770.25/478,855
6. Step 6: Final answer
   x = 1,065,000.77