Finding the Fourth Proportional to 12,940.83, 17,858.34 and 7,275.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.83 : 17,858.34 = 7,275.51 : x
2. Step 2: Convert to fraction form
   12,940.83/17,858.34 = 7,275.51/x
3. Step 3: Cross multiply
   12,940.83x = 17,858.34 × 7,275.51
4. Step 4: Simplify right side
   12,940.83x = 129,928,531.25
5. Step 5: Solve for x
   x = 129,928,531.25/12,940.83
6. Step 6: Final answer
   x = 10,040.20