Finding the Third Proportional to 459,081 and 645,342.75

Step by Step Solution

1. Step 1: Write the proportion equation
   459,081 : 645,342.75 = 645,342.75 : x
2. Step 2: Convert to fraction form
   459,081/645,342.75 = 645,342.75/x
3. Step 3: Cross multiply
   459,081x = 645,342.75 × 645,342.75
4. Step 4: Simplify right side
   459,081x = 416,467,264,977.56
5. Step 5: Solve for x
   x = 416,467,264,977.56/459,081
6. Step 6: Final answer
   x = 907,176.00