Finding the Fourth Proportional to 12,807.51, 19,213.49 and 3,922.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.51 : 19,213.49 = 3,922.64 : x
2. Step 2: Convert to fraction form
   12,807.51/19,213.49 = 3,922.64/x
3. Step 3: Cross multiply
   12,807.51x = 19,213.49 × 3,922.64
4. Step 4: Simplify right side
   12,807.51x = 75,367,518.15
5. Step 5: Solve for x
   x = 75,367,518.15/12,807.51
6. Step 6: Final answer
   x = 5,884.63