Finding the Fourth Proportional to 743,167.56, 1,025,595.46 and 420,870.72

Step by Step Solution

1. Step 1: Write the proportion equation
   743,167.56 : 1,025,595.46 = 420,870.72 : x
2. Step 2: Convert to fraction form
   743,167.56/1,025,595.46 = 420,870.72/x
3. Step 3: Cross multiply
   743,167.56x = 1,025,595.46 × 420,870.72
4. Step 4: Simplify right side
   743,167.56x = 431,643,099,678.93
5. Step 5: Solve for x
   x = 431,643,099,678.93/743,167.56
6. Step 6: Final answer
   x = 580,815.31