Finding the Fourth Proportional to 9,876.72, 13,630.20 and 5,400.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,876.72 : 13,630.20 = 5,400.38 : x
2. Step 2: Convert to fraction form
   9,876.72/13,630.20 = 5,400.38/x
3. Step 3: Cross multiply
   9,876.72x = 13,630.20 × 5,400.38
4. Step 4: Simplify right side
   9,876.72x = 73,608,191.33
5. Step 5: Solve for x
   x = 73,608,191.33/9,876.72
6. Step 6: Final answer
   x = 7,452.70