Finding the Fourth Proportional to 9,870.73, 13,621.24 and 5,394.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.73 : 13,621.24 = 5,394.45 : x
2. Step 2: Convert to fraction form
   9,870.73/13,621.24 = 5,394.45/x
3. Step 3: Cross multiply
   9,870.73x = 13,621.24 × 5,394.45
4. Step 4: Simplify right side
   9,870.73x = 73,479,098.12
5. Step 5: Solve for x
   x = 73,479,098.12/9,870.73
6. Step 6: Final answer
   x = 7,444.14