Finding the Third Proportional to 387,490.50 and 821,076

Step by Step Solution

1. Step 1: Write the proportion equation
   387,490.50 : 821,076 = 821,076 : x
2. Step 2: Convert to fraction form
   387,490.50/821,076 = 821,076/x
3. Step 3: Cross multiply
   387,490.50x = 821,076 × 821,076
4. Step 4: Simplify right side
   387,490.50x = 674,165,797,776
5. Step 5: Solve for x
   x = 674,165,797,776/387,490.50
6. Step 6: Final answer
   x = 1,739,825.36