Finding the Third Proportional to 275,312 and 403,870

Step by Step Solution

1. Step 1: Write the proportion equation
   275,312 : 403,870 = 403,870 : x
2. Step 2: Convert to fraction form
   275,312/403,870 = 403,870/x
3. Step 3: Cross multiply
   275,312x = 403,870 × 403,870
4. Step 4: Simplify right side
   275,312x = 163,110,976,900
5. Step 5: Solve for x
   x = 163,110,976,900/275,312
6. Step 6: Final answer
   x = 592,458.65