Finding the Fourth Proportional to 11,381.81, 17,072.71 and 3,590.63

Step by Step Solution

1. Step 1: Write the proportion equation
   11,381.81 : 17,072.71 = 3,590.63 : x
2. Step 2: Convert to fraction form
   11,381.81/17,072.71 = 3,590.63/x
3. Step 3: Cross multiply
   11,381.81x = 17,072.71 × 3,590.63
4. Step 4: Simplify right side
   11,381.81x = 61,301,690.37
5. Step 5: Solve for x
   x = 61,301,690.37/11,381.81
6. Step 6: Final answer
   x = 5,385.93