Finding the Fourth Proportional to 9,872.51, 13,624.35 and 5,396.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,872.51 : 13,624.35 = 5,396.45 : x
2. Step 2: Convert to fraction form
   9,872.51/13,624.35 = 5,396.45/x
3. Step 3: Cross multiply
   9,872.51x = 13,624.35 × 5,396.45
4. Step 4: Simplify right side
   9,872.51x = 73,523,123.56
5. Step 5: Solve for x
   x = 73,523,123.56/9,872.51
6. Step 6: Final answer
   x = 7,447.26