Finding the Third Proportional to 478,719 and 708,835.50

Step by Step Solution

1. Step 1: Write the proportion equation
   478,719 : 708,835.50 = 708,835.50 : x
2. Step 2: Convert to fraction form
   478,719/708,835.50 = 708,835.50/x
3. Step 3: Cross multiply
   478,719x = 708,835.50 × 708,835.50
4. Step 4: Simplify right side
   478,719x = 502,447,766,060.25
5. Step 5: Solve for x
   x = 502,447,766,060.25/478,719
6. Step 6: Final answer
   x = 1,049,567.21