Finding the Fourth Proportional to 9,720.12, 13,412.32 and 5,470.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,720.12 : 13,412.32 = 5,470.56 : x
2. Step 2: Convert to fraction form
   9,720.12/13,412.32 = 5,470.56/x
3. Step 3: Cross multiply
   9,720.12x = 13,412.32 × 5,470.56
4. Step 4: Simplify right side
   9,720.12x = 73,372,901.30
5. Step 5: Solve for x
   x = 73,372,901.30/9,720.12
6. Step 6: Final answer
   x = 7,548.56