Finding the Third Proportional to 363,874.50 and 521,040

Step by Step Solution

1. Step 1: Write the proportion equation
   363,874.50 : 521,040 = 521,040 : x
2. Step 2: Convert to fraction form
   363,874.50/521,040 = 521,040/x
3. Step 3: Cross multiply
   363,874.50x = 521,040 × 521,040
4. Step 4: Simplify right side
   363,874.50x = 271,482,681,600
5. Step 5: Solve for x
   x = 271,482,681,600/363,874.50
6. Step 6: Final answer
   x = 746,088.78