Finding the Fourth Proportional to 9,887.82, 13,645.20 and 5,411.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,887.82 : 13,645.20 = 5,411.56 : x
2. Step 2: Convert to fraction form
   9,887.82/13,645.20 = 5,411.56/x
3. Step 3: Cross multiply
   9,887.82x = 13,645.20 × 5,411.56
4. Step 4: Simplify right side
   9,887.82x = 73,841,818.51
5. Step 5: Solve for x
   x = 73,841,818.51/9,887.82
6. Step 6: Final answer
   x = 7,467.96