Finding the Fourth Proportional to 12,870.37, 19,308.39 and 7,326.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.37 : 19,308.39 = 7,326.33 : x
2. Step 2: Convert to fraction form
   12,870.37/19,308.39 = 7,326.33/x
3. Step 3: Cross multiply
   12,870.37x = 19,308.39 × 7,326.33
4. Step 4: Simplify right side
   12,870.37x = 141,459,636.91
5. Step 5: Solve for x
   x = 141,459,636.91/12,870.37
6. Step 6: Final answer
   x = 10,991.11