Finding the Fourth Proportional to 10,804.69, 14,890.11 and 7,815.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,804.69 : 14,890.11 = 7,815.45 : x
2. Step 2: Convert to fraction form
   10,804.69/14,890.11 = 7,815.45/x
3. Step 3: Cross multiply
   10,804.69x = 14,890.11 × 7,815.45
4. Step 4: Simplify right side
   10,804.69x = 116,372,910.20
5. Step 5: Solve for x
   x = 116,372,910.20/10,804.69
6. Step 6: Final answer
   x = 10,770.60