Finding the Third Proportional to 400,739.63 and 842,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   400,739.63 : 842,978.25 = 842,978.25 : x
2. Step 2: Convert to fraction form
   400,739.63/842,978.25 = 842,978.25/x
3. Step 3: Cross multiply
   400,739.63x = 842,978.25 × 842,978.25
4. Step 4: Simplify right side
   400,739.63x = 710,612,329,973.06
5. Step 5: Solve for x
   x = 710,612,329,973.06/400,739.63
6. Step 6: Final answer
   x = 1,773,251.97