Finding the Fourth Proportional to 10,699.85, 14,770.96 and 7,120.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,699.85 : 14,770.96 = 7,120.76 : x
2. Step 2: Convert to fraction form
   10,699.85/14,770.96 = 7,120.76/x
3. Step 3: Cross multiply
   10,699.85x = 14,770.96 × 7,120.76
4. Step 4: Simplify right side
   10,699.85x = 105,180,452.56
5. Step 5: Solve for x
   x = 105,180,452.56/10,699.85
6. Step 6: Final answer
   x = 9,830.09