Finding the Fourth Proportional to 743,164.56, 1,025,591.31 and 420,867.72

Step by Step Solution

1. Step 1: Write the proportion equation
   743,164.56 : 1,025,591.31 = 420,867.72 : x
2. Step 2: Convert to fraction form
   743,164.56/1,025,591.31 = 420,867.72/x
3. Step 3: Cross multiply
   743,164.56x = 1,025,591.31 × 420,867.72
4. Step 4: Simplify right side
   743,164.56x = 431,638,276,291.51
5. Step 5: Solve for x
   x = 431,638,276,291.51/743,164.56
6. Step 6: Final answer
   x = 580,811.17