Finding the Third Proportional to 357,858 and 771,763.50

Step by Step Solution

1. Step 1: Write the proportion equation
   357,858 : 771,763.50 = 771,763.50 : x
2. Step 2: Convert to fraction form
   357,858/771,763.50 = 771,763.50/x
3. Step 3: Cross multiply
   357,858x = 771,763.50 × 771,763.50
4. Step 4: Simplify right side
   357,858x = 595,618,899,932.25
5. Step 5: Solve for x
   x = 595,618,899,932.25/357,858
6. Step 6: Final answer
   x = 1,664,400.13