Finding the Fourth Proportional to 9,877.89, 13,631.33 and 5,401.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,877.89 : 13,631.33 = 5,401.55 : x
2. Step 2: Convert to fraction form
   9,877.89/13,631.33 = 5,401.55/x
3. Step 3: Cross multiply
   9,877.89x = 13,631.33 × 5,401.55
4. Step 4: Simplify right side
   9,877.89x = 73,630,296.84
5. Step 5: Solve for x
   x = 73,630,296.84/9,877.89
6. Step 6: Final answer
   x = 7,454.05