Finding the Fourth Proportional to 11,858.72, 17,782.28 and 6,929.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,858.72 : 17,782.28 = 6,929.60 : x
2. Step 2: Convert to fraction form
   11,858.72/17,782.28 = 6,929.60/x
3. Step 3: Cross multiply
   11,858.72x = 17,782.28 × 6,929.60
4. Step 4: Simplify right side
   11,858.72x = 123,224,087.49
5. Step 5: Solve for x
   x = 123,224,087.49/11,858.72
6. Step 6: Final answer
   x = 10,391.01