Finding the Fourth Proportional to 10,783.05, 14,872.59 and 9,521.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,783.05 : 14,872.59 = 9,521.88 : x
2. Step 2: Convert to fraction form
   10,783.05/14,872.59 = 9,521.88/x
3. Step 3: Cross multiply
   10,783.05x = 14,872.59 × 9,521.88
4. Step 4: Simplify right side
   10,783.05x = 141,615,017.27
5. Step 5: Solve for x
   x = 141,615,017.27/10,783.05
6. Step 6: Final answer
   x = 13,133.11