Finding the Fourth Proportional to 7,914.78, 10,931.58 and 5,257.62

Step by Step Solution

1. Step 1: Write the proportion equation
   7,914.78 : 10,931.58 = 5,257.62 : x
2. Step 2: Convert to fraction form
   7,914.78/10,931.58 = 5,257.62/x
3. Step 3: Cross multiply
   7,914.78x = 10,931.58 × 5,257.62
4. Step 4: Simplify right side
   7,914.78x = 57,474,093.64
5. Step 5: Solve for x
   x = 57,474,093.64/7,914.78
6. Step 6: Final answer
   x = 7,261.62