Finding the Fourth Proportional to 9,428.49, 12,998.93 and 7,836.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.49 : 12,998.93 = 7,836.50 : x
2. Step 2: Convert to fraction form
   9,428.49/12,998.93 = 7,836.50/x
3. Step 3: Cross multiply
   9,428.49x = 12,998.93 × 7,836.50
4. Step 4: Simplify right side
   9,428.49x = 101,866,010.77
5. Step 5: Solve for x
   x = 101,866,010.77/9,428.49
6. Step 6: Final answer
   x = 10,804.06