Finding the Fourth Proportional to 9,870.75, 13,621.21 and 5,394.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.75 : 13,621.21 = 5,394.69 : x
2. Step 2: Convert to fraction form
   9,870.75/13,621.21 = 5,394.69/x
3. Step 3: Cross multiply
   9,870.75x = 13,621.21 × 5,394.69
4. Step 4: Simplify right side
   9,870.75x = 73,482,205.37
5. Step 5: Solve for x
   x = 73,482,205.37/9,870.75
6. Step 6: Final answer
   x = 7,444.44