Finding the Fourth Proportional to 15,100.67, 20,839.59 and 8,386.31

Step by Step Solution

1. Step 1: Write the proportion equation
   15,100.67 : 20,839.59 = 8,386.31 : x
2. Step 2: Convert to fraction form
   15,100.67/20,839.59 = 8,386.31/x
3. Step 3: Cross multiply
   15,100.67x = 20,839.59 × 8,386.31
4. Step 4: Simplify right side
   15,100.67x = 174,767,314.11
5. Step 5: Solve for x
   x = 174,767,314.11/15,100.67
6. Step 6: Final answer
   x = 11,573.48