Finding the Fourth Proportional to 9,869.94, 13,620.71 and 5,393.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,869.94 : 13,620.71 = 5,393.88 : x
2. Step 2: Convert to fraction form
   9,869.94/13,620.71 = 5,393.88/x
3. Step 3: Cross multiply
   9,869.94x = 13,620.71 × 5,393.88
4. Step 4: Simplify right side
   9,869.94x = 73,468,488.74
5. Step 5: Solve for x
   x = 73,468,488.74/9,869.94
6. Step 6: Final answer
   x = 7,443.66