Finding the Third Proportional to 219,079.50 and 448,521

Step by Step Solution

1. Step 1: Write the proportion equation
   219,079.50 : 448,521 = 448,521 : x
2. Step 2: Convert to fraction form
   219,079.50/448,521 = 448,521/x
3. Step 3: Cross multiply
   219,079.50x = 448,521 × 448,521
4. Step 4: Simplify right side
   219,079.50x = 201,171,087,441
5. Step 5: Solve for x
   x = 201,171,087,441/219,079.50
6. Step 6: Final answer
   x = 918,256.10