Finding the Fourth Proportional to 9,719.57, 13,412.72 and 5,470.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,719.57 : 13,412.72 = 5,470.87 : x
2. Step 2: Convert to fraction form
   9,719.57/13,412.72 = 5,470.87/x
3. Step 3: Cross multiply
   9,719.57x = 13,412.72 × 5,470.87
4. Step 4: Simplify right side
   9,719.57x = 73,379,153.05
5. Step 5: Solve for x
   x = 73,379,153.05/9,719.57
6. Step 6: Final answer
   x = 7,549.63