Finding the Fourth Proportional to 13,320.27, 19,978.94 and 4,771.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320.27 : 19,978.94 = 4,771.37 : x
2. Step 2: Convert to fraction form
   13,320.27/19,978.94 = 4,771.37/x
3. Step 3: Cross multiply
   13,320.27x = 19,978.94 × 4,771.37
4. Step 4: Simplify right side
   13,320.27x = 95,326,976.82
5. Step 5: Solve for x
   x = 95,326,976.82/13,320.27
6. Step 6: Final answer
   x = 7,156.53