Finding the Fourth Proportional to 13,145.51, 19,718.16 and 3,284.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,145.51 : 19,718.16 = 3,284.72 : x
2. Step 2: Convert to fraction form
   13,145.51/19,718.16 = 3,284.72/x
3. Step 3: Cross multiply
   13,145.51x = 19,718.16 × 3,284.72
4. Step 4: Simplify right side
   13,145.51x = 64,768,634.52
5. Step 5: Solve for x
   x = 64,768,634.52/13,145.51
6. Step 6: Final answer
   x = 4,927.05