Finding the Fourth Proportional to 5,290.63, 7,889.37 and 4,921.27

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290.63 : 7,889.37 = 4,921.27 : x
2. Step 2: Convert to fraction form
   5,290.63/7,889.37 = 4,921.27/x
3. Step 3: Cross multiply
   5,290.63x = 7,889.37 × 4,921.27
4. Step 4: Simplify right side
   5,290.63x = 38,825,707.60
5. Step 5: Solve for x
   x = 38,825,707.60/5,290.63
6. Step 6: Final answer
   x = 7,338.58