Finding the Fourth Proportional to 10,421.21, 14,381.27 and 5,705.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,421.21 : 14,381.27 = 5,705.49 : x
2. Step 2: Convert to fraction form
   10,421.21/14,381.27 = 5,705.49/x
3. Step 3: Cross multiply
   10,421.21x = 14,381.27 × 5,705.49
4. Step 4: Simplify right side
   10,421.21x = 82,052,192.17
5. Step 5: Solve for x
   x = 82,052,192.17/10,421.21
6. Step 6: Final answer
   x = 7,873.58