Finding the Fourth Proportional to 10,783.04, 14,872.96 and 10,421.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,783.04 : 14,872.96 = 10,421.76 : x
2. Step 2: Convert to fraction form
   10,783.04/14,872.96 = 10,421.76/x
3. Step 3: Cross multiply
   10,783.04x = 14,872.96 × 10,421.76
4. Step 4: Simplify right side
   10,783.04x = 155,002,419.61
5. Step 5: Solve for x
   x = 155,002,419.61/10,783.04
6. Step 6: Final answer
   x = 14,374.65