Finding the Fourth Proportional to 422,298.72, 582,830.20 and 258,926.32

Step by Step Solution

1. Step 1: Write the proportion equation
   422,298.72 : 582,830.20 = 258,926.32 : x
2. Step 2: Convert to fraction form
   422,298.72/582,830.20 = 258,926.32/x
3. Step 3: Cross multiply
   422,298.72x = 582,830.20 × 258,926.32
4. Step 4: Simplify right side
   422,298.72x = 150,910,078,870.86
5. Step 5: Solve for x
   x = 150,910,078,870.86/422,298.72
6. Step 6: Final answer
   x = 357,353.86