Finding the Fourth Proportional to 11,381.34, 17,071.49 and 3,987.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,381.34 : 17,071.49 = 3,987.47 : x
2. Step 2: Convert to fraction form
   11,381.34/17,071.49 = 3,987.47/x
3. Step 3: Cross multiply
   11,381.34x = 17,071.49 × 3,987.47
4. Step 4: Simplify right side
   11,381.34x = 68,071,948.94
5. Step 5: Solve for x
   x = 68,071,948.94/11,381.34
6. Step 6: Final answer
   x = 5,981.01