Finding the Fourth Proportional to 11,162.31, 16,726.50 and 7,639.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,162.31 : 16,726.50 = 7,639.89 : x
2. Step 2: Convert to fraction form
   11,162.31/16,726.50 = 7,639.89/x
3. Step 3: Cross multiply
   11,162.31x = 16,726.50 × 7,639.89
4. Step 4: Simplify right side
   11,162.31x = 127,788,620.09
5. Step 5: Solve for x
   x = 127,788,620.09/11,162.31
6. Step 6: Final answer
   x = 11,448.22