Finding the Fourth Proportional to 9,905.05, 14,828.83 and 7,707.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,905.05 : 14,828.83 = 7,707.12 : x
2. Step 2: Convert to fraction form
   9,905.05/14,828.83 = 7,707.12/x
3. Step 3: Cross multiply
   9,905.05x = 14,828.83 × 7,707.12
4. Step 4: Simplify right side
   9,905.05x = 114,287,572.27
5. Step 5: Solve for x
   x = 114,287,572.27/9,905.05
6. Step 6: Final answer
   x = 11,538.31