Finding the Fourth Proportional to 9,888.67, 13,645.83 and 5,411.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,888.67 : 13,645.83 = 5,411.53 : x
2. Step 2: Convert to fraction form
   9,888.67/13,645.83 = 5,411.53/x
3. Step 3: Cross multiply
   9,888.67x = 13,645.83 × 5,411.53
4. Step 4: Simplify right side
   9,888.67x = 73,844,818.42
5. Step 5: Solve for x
   x = 73,844,818.42/9,888.67
6. Step 6: Final answer
   x = 7,467.62