Finding the Third Proportional to 191,146 and 415,521

Step by Step Solution

1. Step 1: Write the proportion equation
   191,146 : 415,521 = 415,521 : x
2. Step 2: Convert to fraction form
   191,146/415,521 = 415,521/x
3. Step 3: Cross multiply
   191,146x = 415,521 × 415,521
4. Step 4: Simplify right side
   191,146x = 172,657,701,441
5. Step 5: Solve for x
   x = 172,657,701,441/191,146
6. Step 6: Final answer
   x = 903,276.56