Finding the Fourth Proportional to 570,422, 787,389.72 and 331,958

Step by Step Solution

1. Step 1: Write the proportion equation
   570,422 : 787,389.72 = 331,958 : x
2. Step 2: Convert to fraction form
   570,422/787,389.72 = 331,958/x
3. Step 3: Cross multiply
   570,422x = 787,389.72 × 331,958
4. Step 4: Simplify right side
   570,422x = 261,380,316,671.76
5. Step 5: Solve for x
   x = 261,380,316,671.76/570,422
6. Step 6: Final answer
   x = 458,222.71