Finding the Fourth Proportional to 9,853.51, 13,597.86 and 5,377.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,853.51 : 13,597.86 = 5,377.21 : x
2. Step 2: Convert to fraction form
   9,853.51/13,597.86 = 5,377.21/x
3. Step 3: Cross multiply
   9,853.51x = 13,597.86 × 5,377.21
4. Step 4: Simplify right side
   9,853.51x = 73,118,548.77
5. Step 5: Solve for x
   x = 73,118,548.77/9,853.51
6. Step 6: Final answer
   x = 7,420.56