Finding the Third Proportional to 405,336 and 879,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   405,336 : 879,899.50 = 879,899.50 : x
2. Step 2: Convert to fraction form
   405,336/879,899.50 = 879,899.50/x
3. Step 3: Cross multiply
   405,336x = 879,899.50 × 879,899.50
4. Step 4: Simplify right side
   405,336x = 774,223,130,100.25
5. Step 5: Solve for x
   x = 774,223,130,100.25/405,336
6. Step 6: Final answer
   x = 1,910,077.39