Finding the Third Proportional to 620,889 and 949,378.50

Step by Step Solution

1. Step 1: Write the proportion equation
   620,889 : 949,378.50 = 949,378.50 : x
2. Step 2: Convert to fraction form
   620,889/949,378.50 = 949,378.50/x
3. Step 3: Cross multiply
   620,889x = 949,378.50 × 949,378.50
4. Step 4: Simplify right side
   620,889x = 901,319,536,262.25
5. Step 5: Solve for x
   x = 901,319,536,262.25/620,889
6. Step 6: Final answer
   x = 1,451,659.69