Finding the Fourth Proportional to 679,160.24, 1,018,774.20 and 258,468.72

Step by Step Solution

1. Step 1: Write the proportion equation
   679,160.24 : 1,018,774.20 = 258,468.72 : x
2. Step 2: Convert to fraction form
   679,160.24/1,018,774.20 = 258,468.72/x
3. Step 3: Cross multiply
   679,160.24x = 1,018,774.20 × 258,468.72
4. Step 4: Simplify right side
   679,160.24x = 263,321,263,443.02
5. Step 5: Solve for x
   x = 263,321,263,443.02/679,160.24
6. Step 6: Final answer
   x = 387,715.96