Finding the Fourth Proportional to 5,470.76, 7,549.56 and 3,112.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,470.76 : 7,549.56 = 3,112.89 : x
2. Step 2: Convert to fraction form
   5,470.76/7,549.56 = 3,112.89/x
3. Step 3: Cross multiply
   5,470.76x = 7,549.56 × 3,112.89
4. Step 4: Simplify right side
   5,470.76x = 23,500,949.83
5. Step 5: Solve for x
   x = 23,500,949.83/5,470.76
6. Step 6: Final answer
   x = 4,295.74