Finding the Fourth Proportional to 9,718.94, 13,412.20 and 5,470.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,718.94 : 13,412.20 = 5,470.09 : x
2. Step 2: Convert to fraction form
   9,718.94/13,412.20 = 5,470.09/x
3. Step 3: Cross multiply
   9,718.94x = 13,412.20 × 5,470.09
4. Step 4: Simplify right side
   9,718.94x = 73,365,893.89
5. Step 5: Solve for x
   x = 73,365,893.89/9,718.94
6. Step 6: Final answer
   x = 7,548.75