Finding the Fourth Proportional to 11,665.32, 17,423.63 and 10,553.03

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.32 : 17,423.63 = 10,553.03 : x
2. Step 2: Convert to fraction form
   11,665.32/17,423.63 = 10,553.03/x
3. Step 3: Cross multiply
   11,665.32x = 17,423.63 × 10,553.03
4. Step 4: Simplify right side
   11,665.32x = 183,872,037.33
5. Step 5: Solve for x
   x = 183,872,037.33/11,665.32
6. Step 6: Final answer
   x = 15,762.29