Finding the Fourth Proportional to 9,262.79, 12,783.89 and 5,485.66

Step by Step Solution

1. Step 1: Write the proportion equation
   9,262.79 : 12,783.89 = 5,485.66 : x
2. Step 2: Convert to fraction form
   9,262.79/12,783.89 = 5,485.66/x
3. Step 3: Cross multiply
   9,262.79x = 12,783.89 × 5,485.66
4. Step 4: Simplify right side
   9,262.79x = 70,128,014.63
5. Step 5: Solve for x
   x = 70,128,014.63/9,262.79
6. Step 6: Final answer
   x = 7,570.94