Finding the Third Proportional to 191,783 and 403,789

Step by Step Solution

1. Step 1: Write the proportion equation
   191,783 : 403,789 = 403,789 : x
2. Step 2: Convert to fraction form
   191,783/403,789 = 403,789/x
3. Step 3: Cross multiply
   191,783x = 403,789 × 403,789
4. Step 4: Simplify right side
   191,783x = 163,045,556,521
5. Step 5: Solve for x
   x = 163,045,556,521/191,783
6. Step 6: Final answer
   x = 850,156.46