Finding the Third Proportional to 403,042.50 and 879,768

Step by Step Solution

1. Step 1: Write the proportion equation
   403,042.50 : 879,768 = 879,768 : x
2. Step 2: Convert to fraction form
   403,042.50/879,768 = 879,768/x
3. Step 3: Cross multiply
   403,042.50x = 879,768 × 879,768
4. Step 4: Simplify right side
   403,042.50x = 773,991,733,824
5. Step 5: Solve for x
   x = 773,991,733,824/403,042.50
6. Step 6: Final answer
   x = 1,920,372.50