Finding the Fourth Proportional to 10,421.36, 14,381.48 and 5,705.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,421.36 : 14,381.48 = 5,705.52 : x
2. Step 2: Convert to fraction form
   10,421.36/14,381.48 = 5,705.52/x
3. Step 3: Cross multiply
   10,421.36x = 14,381.48 × 5,705.52
4. Step 4: Simplify right side
   10,421.36x = 82,053,821.77
5. Step 5: Solve for x
   x = 82,053,821.77/10,421.36
6. Step 6: Final answer
   x = 7,873.62