Finding the Fourth Proportional to 9,881.34, 13,635.51 and 5,404.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,881.34 : 13,635.51 = 5,404.86 : x
2. Step 2: Convert to fraction form
   9,881.34/13,635.51 = 5,404.86/x
3. Step 3: Cross multiply
   9,881.34x = 13,635.51 × 5,404.86
4. Step 4: Simplify right side
   9,881.34x = 73,698,022.58
5. Step 5: Solve for x
   x = 73,698,022.58/9,881.34
6. Step 6: Final answer
   x = 7,458.30