Finding the Third Proportional to 285,840 and 445,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,840 : 445,081.50 = 445,081.50 : x
2. Step 2: Convert to fraction form
   285,840/445,081.50 = 445,081.50/x
3. Step 3: Cross multiply
   285,840x = 445,081.50 × 445,081.50
4. Step 4: Simplify right side
   285,840x = 198,097,541,642.25
5. Step 5: Solve for x
   x = 198,097,541,642.25/285,840
6. Step 6: Final answer
   x = 693,036.46