Finding the Fourth Proportional to 10,421.04, 14,380.80 and 5,705.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,421.04 : 14,380.80 = 5,705.22 : x
2. Step 2: Convert to fraction form
   10,421.04/14,380.80 = 5,705.22/x
3. Step 3: Cross multiply
   10,421.04x = 14,380.80 × 5,705.22
4. Step 4: Simplify right side
   10,421.04x = 82,045,627.78
5. Step 5: Solve for x
   x = 82,045,627.78/10,421.04
6. Step 6: Final answer
   x = 7,873.07