Finding the Fourth Proportional to 9,920.31, 13,690.88 and 5,444.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.31 : 13,690.88 = 5,444.92 : x
2. Step 2: Convert to fraction form
   9,920.31/13,690.88 = 5,444.92/x
3. Step 3: Cross multiply
   9,920.31x = 13,690.88 × 5,444.92
4. Step 4: Simplify right side
   9,920.31x = 74,545,746.33
5. Step 5: Solve for x
   x = 74,545,746.33/9,920.31
6. Step 6: Final answer
   x = 7,514.46