Finding the Fourth Proportional to 1,086,499.70, 1,629,101.55 and 666,077.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,499.70 : 1,629,101.55 = 666,077.30 : x
2. Step 2: Convert to fraction form
   1,086,499.70/1,629,101.55 = 666,077.30/x
3. Step 3: Cross multiply
   1,086,499.70x = 1,629,101.55 × 666,077.30
4. Step 4: Simplify right side
   1,086,499.70x = 1,085,107,561,849.82
5. Step 5: Solve for x
   x = 1,085,107,561,849.82/1,086,499.70
6. Step 6: Final answer
   x = 998,718.69