Finding the Fourth Proportional to 9,870.82, 13,621.33 and 5,394.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.82 : 13,621.33 = 5,394.73 : x
2. Step 2: Convert to fraction form
   9,870.82/13,621.33 = 5,394.73/x
3. Step 3: Cross multiply
   9,870.82x = 13,621.33 × 5,394.73
4. Step 4: Simplify right side
   9,870.82x = 73,483,302.51
5. Step 5: Solve for x
   x = 73,483,302.51/9,870.82
6. Step 6: Final answer
   x = 7,444.50