Finding the Fourth Proportional to 9,886.72, 13,643.76 and 5,410.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886.72 : 13,643.76 = 5,410.54 : x
2. Step 2: Convert to fraction form
   9,886.72/13,643.76 = 5,410.54/x
3. Step 3: Cross multiply
   9,886.72x = 13,643.76 × 5,410.54
4. Step 4: Simplify right side
   9,886.72x = 73,820,109.23
5. Step 5: Solve for x
   x = 73,820,109.23/9,886.72
6. Step 6: Final answer
   x = 7,466.59