Finding the Fourth Proportional to 38,994.72, 53,812.72 and 21,089.73

Step by Step Solution

1. Step 1: Write the proportion equation
   38,994.72 : 53,812.72 = 21,089.73 : x
2. Step 2: Convert to fraction form
   38,994.72/53,812.72 = 21,089.73/x
3. Step 3: Cross multiply
   38,994.72x = 53,812.72 × 21,089.73
4. Step 4: Simplify right side
   38,994.72x = 1,134,895,735.37
5. Step 5: Solve for x
   x = 1,134,895,735.37/38,994.72
6. Step 6: Final answer
   x = 29,103.83