Finding the Third Proportional to 210,325.78 and 456,139.69

Step by Step Solution

1. Step 1: Write the proportion equation
   210,325.78 : 456,139.69 = 456,139.69 : x
2. Step 2: Convert to fraction form
   210,325.78/456,139.69 = 456,139.69/x
3. Step 3: Cross multiply
   210,325.78x = 456,139.69 × 456,139.69
4. Step 4: Simplify right side
   210,325.78x = 208,063,414,512.60
5. Step 5: Solve for x
   x = 208,063,414,512.60/210,325.78
6. Step 6: Final answer
   x = 989,243.51