Finding the Fourth Proportional to 10,421.07, 14,380.70 and 5,705.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,421.07 : 14,380.70 = 5,705.39 : x
2. Step 2: Convert to fraction form
   10,421.07/14,380.70 = 5,705.39/x
3. Step 3: Cross multiply
   10,421.07x = 14,380.70 × 5,705.39
4. Step 4: Simplify right side
   10,421.07x = 82,047,401.54
5. Step 5: Solve for x
   x = 82,047,401.54/10,421.07
6. Step 6: Final answer
   x = 7,873.22