Finding the Third Proportional to 300,475.50 and 709,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,475.50 : 709,300.50 = 709,300.50 : x
2. Step 2: Convert to fraction form
   300,475.50/709,300.50 = 709,300.50/x
3. Step 3: Cross multiply
   300,475.50x = 709,300.50 × 709,300.50
4. Step 4: Simplify right side
   300,475.50x = 503,107,199,300.25
5. Step 5: Solve for x
   x = 503,107,199,300.25/300,475.50
6. Step 6: Final answer
   x = 1,674,370.12