Finding the Third Proportional to 179,782 and 390,940

Step by Step Solution

1. Step 1: Write the proportion equation
   179,782 : 390,940 = 390,940 : x
2. Step 2: Convert to fraction form
   179,782/390,940 = 390,940/x
3. Step 3: Cross multiply
   179,782x = 390,940 × 390,940
4. Step 4: Simplify right side
   179,782x = 152,834,083,600
5. Step 5: Solve for x
   x = 152,834,083,600/179,782
6. Step 6: Final answer
   x = 850,107.82