Finding the Fourth Proportional to 10,420.76, 14,380.26 and 5,705

Step by Step Solution

1. Step 1: Write the proportion equation
   10,420.76 : 14,380.26 = 5,705 : x
2. Step 2: Convert to fraction form
   10,420.76/14,380.26 = 5,705/x
3. Step 3: Cross multiply
   10,420.76x = 14,380.26 × 5,705
4. Step 4: Simplify right side
   10,420.76x = 82,039,383.30
5. Step 5: Solve for x
   x = 82,039,383.30/10,420.76
6. Step 6: Final answer
   x = 7,872.69