Finding the Fourth Proportional to 9,929.81, 13,702.91 and 5,453.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,929.81 : 13,702.91 = 5,453.55 : x
2. Step 2: Convert to fraction form
   9,929.81/13,702.91 = 5,453.55/x
3. Step 3: Cross multiply
   9,929.81x = 13,702.91 × 5,453.55
4. Step 4: Simplify right side
   9,929.81x = 74,729,477.56
5. Step 5: Solve for x
   x = 74,729,477.56/9,929.81
6. Step 6: Final answer
   x = 7,525.77