Finding the Fourth Proportional to 12,870.08, 19,284.96 and 10,272.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.08 : 19,284.96 = 10,272.32 : x
2. Step 2: Convert to fraction form
   12,870.08/19,284.96 = 10,272.32/x
3. Step 3: Cross multiply
   12,870.08x = 19,284.96 × 10,272.32
4. Step 4: Simplify right side
   12,870.08x = 198,101,280.31
5. Step 5: Solve for x
   x = 198,101,280.31/12,870.08
6. Step 6: Final answer
   x = 15,392.39