Finding the Fourth Proportional to 12,870.12, 19,308.02 and 7,326.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.12 : 19,308.02 = 7,326.08 : x
2. Step 2: Convert to fraction form
   12,870.12/19,308.02 = 7,326.08/x
3. Step 3: Cross multiply
   12,870.12x = 19,308.02 × 7,326.08
4. Step 4: Simplify right side
   12,870.12x = 141,452,099.16
5. Step 5: Solve for x
   x = 141,452,099.16/12,870.12
6. Step 6: Final answer
   x = 10,990.74