Finding the Third Proportional to 858,490 and 1,864,600

Step by Step Solution

1. Step 1: Write the proportion equation
   858,490 : 1,864,600 = 1,864,600 : x
2. Step 2: Convert to fraction form
   858,490/1,864,600 = 1,864,600/x
3. Step 3: Cross multiply
   858,490x = 1,864,600 × 1,864,600
4. Step 4: Simplify right side
   858,490x = 3,476,733,160,000
5. Step 5: Solve for x
   x = 3,476,733,160,000/858,490
6. Step 6: Final answer
   x = 4,049,823.71