Finding the Fourth Proportional to 9,870.20, 13,620.84 and 5,393.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.20 : 13,620.84 = 5,393.93 : x
2. Step 2: Convert to fraction form
   9,870.20/13,620.84 = 5,393.93/x
3. Step 3: Cross multiply
   9,870.20x = 13,620.84 × 5,393.93
4. Step 4: Simplify right side
   9,870.20x = 73,469,914.44
5. Step 5: Solve for x
   x = 73,469,914.44/9,870.20
6. Step 6: Final answer
   x = 7,443.61