Finding the Fourth Proportional to 10,421.51, 14,381.55 and 5,705.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,421.51 : 14,381.55 = 5,705.69 : x
2. Step 2: Convert to fraction form
   10,421.51/14,381.55 = 5,705.69/x
3. Step 3: Cross multiply
   10,421.51x = 14,381.55 × 5,705.69
4. Step 4: Simplify right side
   10,421.51x = 82,056,594.11
5. Step 5: Solve for x
   x = 82,056,594.11/10,421.51
6. Step 6: Final answer
   x = 7,873.78