Finding the Fourth Proportional to 9,945.71, 13,725.43 and 5,469.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.71 : 13,725.43 = 5,469.80 : x
2. Step 2: Convert to fraction form
   9,945.71/13,725.43 = 5,469.80/x
3. Step 3: Cross multiply
   9,945.71x = 13,725.43 × 5,469.80
4. Step 4: Simplify right side
   9,945.71x = 75,075,261.04
5. Step 5: Solve for x
   x = 75,075,261.04/9,945.71
6. Step 6: Final answer
   x = 7,548.51