Finding the Fourth Proportional to 9,386.69, 12,953.59 and 5,137.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,386.69 : 12,953.59 = 5,137.76 : x
2. Step 2: Convert to fraction form
   9,386.69/12,953.59 = 5,137.76/x
3. Step 3: Cross multiply
   9,386.69x = 12,953.59 × 5,137.76
4. Step 4: Simplify right side
   9,386.69x = 66,552,456.10
5. Step 5: Solve for x
   x = 66,552,456.10/9,386.69
6. Step 6: Final answer
   x = 7,090.09