Finding the Third Proportional to 321,113.81 and 705,789

Step by Step Solution

1. Step 1: Write the proportion equation
   321,113.81 : 705,789 = 705,789 : x
2. Step 2: Convert to fraction form
   321,113.81/705,789 = 705,789/x
3. Step 3: Cross multiply
   321,113.81x = 705,789 × 705,789
4. Step 4: Simplify right side
   321,113.81x = 498,138,112,521
5. Step 5: Solve for x
   x = 498,138,112,521/321,113.81
6. Step 6: Final answer
   x = 1,551,282.11