Finding the Third Proportional to 346,242 and 531,870

Step by Step Solution

1. Step 1: Write the proportion equation
   346,242 : 531,870 = 531,870 : x
2. Step 2: Convert to fraction form
   346,242/531,870 = 531,870/x
3. Step 3: Cross multiply
   346,242x = 531,870 × 531,870
4. Step 4: Simplify right side
   346,242x = 282,885,696,900
5. Step 5: Solve for x
   x = 282,885,696,900/346,242
6. Step 6: Final answer
   x = 817,017.28