Finding the Fourth Proportional to 7,928.41, 10,931.25 and 5,090.77

Step by Step Solution

1. Step 1: Write the proportion equation
   7,928.41 : 10,931.25 = 5,090.77 : x
2. Step 2: Convert to fraction form
   7,928.41/10,931.25 = 5,090.77/x
3. Step 3: Cross multiply
   7,928.41x = 10,931.25 × 5,090.77
4. Step 4: Simplify right side
   7,928.41x = 55,648,479.56
5. Step 5: Solve for x
   x = 55,648,479.56/7,928.41
6. Step 6: Final answer
   x = 7,018.87