Finding the Fourth Proportional to 3,012.42, 4,516.89 and 931.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,012.42 : 4,516.89 = 931.87 : x
2. Step 2: Convert to fraction form
   3,012.42/4,516.89 = 931.87/x
3. Step 3: Cross multiply
   3,012.42x = 4,516.89 × 931.87
4. Step 4: Simplify right side
   3,012.42x = 4,209,154.28
5. Step 5: Solve for x
   x = 4,209,154.28/3,012.42
6. Step 6: Final answer
   x = 1,397.27