Finding the Fourth Proportional to 11,906.63, 17,860.73 and 3,586.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,906.63 : 17,860.73 = 3,586.31 : x
2. Step 2: Convert to fraction form
   11,906.63/17,860.73 = 3,586.31/x
3. Step 3: Cross multiply
   11,906.63x = 17,860.73 × 3,586.31
4. Step 4: Simplify right side
   11,906.63x = 64,054,114.61
5. Step 5: Solve for x
   x = 64,054,114.61/11,906.63
6. Step 6: Final answer
   x = 5,379.70