Finding the Fourth Proportional to 9,262.45, 12,780.18 and 5,486.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,262.45 : 12,780.18 = 5,486.79 : x
2. Step 2: Convert to fraction form
   9,262.45/12,780.18 = 5,486.79/x
3. Step 3: Cross multiply
   9,262.45x = 12,780.18 × 5,486.79
4. Step 4: Simplify right side
   9,262.45x = 70,122,139.86
5. Step 5: Solve for x
   x = 70,122,139.86/9,262.45
6. Step 6: Final answer
   x = 7,570.58