Finding the Fourth Proportional to 9,046.69, 13,590.83 and 6,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,046.69 : 13,590.83 = 6,420.72 : x
2. Step 2: Convert to fraction form
   9,046.69/13,590.83 = 6,420.72/x
3. Step 3: Cross multiply
   9,046.69x = 13,590.83 × 6,420.72
4. Step 4: Simplify right side
   9,046.69x = 87,262,813.94
5. Step 5: Solve for x
   x = 87,262,813.94/9,046.69
6. Step 6: Final answer
   x = 9,645.83