Finding the Fourth Proportional to 9,882.94, 13,638.72 and 5,406.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,882.94 : 13,638.72 = 5,406.94 : x
2. Step 2: Convert to fraction form
   9,882.94/13,638.72 = 5,406.94/x
3. Step 3: Cross multiply
   9,882.94x = 13,638.72 × 5,406.94
4. Step 4: Simplify right side
   9,882.94x = 73,743,740.72
5. Step 5: Solve for x
   x = 73,743,740.72/9,882.94
6. Step 6: Final answer
   x = 7,461.72