Finding the Third Proportional to 455,328 and 990,978.75

Step by Step Solution

1. Step 1: Write the proportion equation
   455,328 : 990,978.75 = 990,978.75 : x
2. Step 2: Convert to fraction form
   455,328/990,978.75 = 990,978.75/x
3. Step 3: Cross multiply
   455,328x = 990,978.75 × 990,978.75
4. Step 4: Simplify right side
   455,328x = 982,038,882,951.56
5. Step 5: Solve for x
   x = 982,038,882,951.56/455,328
6. Step 6: Final answer
   x = 2,156,772.44