Finding the Fourth Proportional to 9,929.33, 13,702.72 and 5,392.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,929.33 : 13,702.72 = 5,392.21 : x
2. Step 2: Convert to fraction form
   9,929.33/13,702.72 = 5,392.21/x
3. Step 3: Cross multiply
   9,929.33x = 13,702.72 × 5,392.21
4. Step 4: Simplify right side
   9,929.33x = 73,887,861.82
5. Step 5: Solve for x
   x = 73,887,861.82/9,929.33
6. Step 6: Final answer
   x = 7,441.37