Finding the Fourth Proportional to 11,122.81, 16,667.59 and 10,302.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,122.81 : 16,667.59 = 10,302.69 : x
2. Step 2: Convert to fraction form
   11,122.81/16,667.59 = 10,302.69/x
3. Step 3: Cross multiply
   11,122.81x = 16,667.59 × 10,302.69
4. Step 4: Simplify right side
   11,122.81x = 171,721,012.82
5. Step 5: Solve for x
   x = 171,721,012.82/11,122.81
6. Step 6: Final answer
   x = 15,438.64