Finding the Fourth Proportional to 1,776,475.43, 2,664,688.39 and 428,626.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776,475.43 : 2,664,688.39 = 428,626.72 : x
2. Step 2: Convert to fraction form
   1,776,475.43/2,664,688.39 = 428,626.72/x
3. Step 3: Cross multiply
   1,776,475.43x = 2,664,688.39 × 428,626.72
4. Step 4: Simplify right side
   1,776,475.43x = 1,142,156,646,687.07
5. Step 5: Solve for x
   x = 1,142,156,646,687.07/1,776,475.43
6. Step 6: Final answer
   x = 642,934.11