Finding the Fourth Proportional to 1,041.86, 1,561.43 and 931.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,041.86 : 1,561.43 = 931.53 : x
2. Step 2: Convert to fraction form
   1,041.86/1,561.43 = 931.53/x
3. Step 3: Cross multiply
   1,041.86x = 1,561.43 × 931.53
4. Step 4: Simplify right side
   1,041.86x = 1,454,506.42
5. Step 5: Solve for x
   x = 1,454,506.42/1,041.86
6. Step 6: Final answer
   x = 1,396.07