Finding the Fourth Proportional to 21,111.56, 31,678.18 and 9,432.44

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.56 : 31,678.18 = 9,432.44 : x
2. Step 2: Convert to fraction form
   21,111.56/31,678.18 = 9,432.44/x
3. Step 3: Cross multiply
   21,111.56x = 31,678.18 × 9,432.44
4. Step 4: Simplify right side
   21,111.56x = 298,802,532.16
5. Step 5: Solve for x
   x = 298,802,532.16/21,111.56
6. Step 6: Final answer
   x = 14,153.50