Finding the Fourth Proportional to 1,776,499.43, 2,664,724.50 and 428,650.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776,499.43 : 2,664,724.50 = 428,650.79 : x
2. Step 2: Convert to fraction form
   1,776,499.43/2,664,724.50 = 428,650.79/x
3. Step 3: Cross multiply
   1,776,499.43x = 2,664,724.50 × 428,650.79
4. Step 4: Simplify right side
   1,776,499.43x = 1,142,236,248,733.73
5. Step 5: Solve for x
   x = 1,142,236,248,733.73/1,776,499.43
6. Step 6: Final answer
   x = 642,970.23