Finding the Third Proportional to 455,870 and 978,200

Step by Step Solution

1. Step 1: Write the proportion equation
   455,870 : 978,200 = 978,200 : x
2. Step 2: Convert to fraction form
   455,870/978,200 = 978,200/x
3. Step 3: Cross multiply
   455,870x = 978,200 × 978,200
4. Step 4: Simplify right side
   455,870x = 956,875,240,000
5. Step 5: Solve for x
   x = 956,875,240,000/455,870
6. Step 6: Final answer
   x = 2,099,009.02