Finding the Third Proportional to 403,290 and 619,034.63

Step by Step Solution

1. Step 1: Write the proportion equation
   403,290 : 619,034.63 = 619,034.63 : x
2. Step 2: Convert to fraction form
   403,290/619,034.63 = 619,034.63/x
3. Step 3: Cross multiply
   403,290x = 619,034.63 × 619,034.63
4. Step 4: Simplify right side
   403,290x = 383,203,866,948.89
5. Step 5: Solve for x
   x = 383,203,866,948.89/403,290
6. Step 6: Final answer
   x = 950,194.32