Finding the Fourth Proportional to 1,356.14, 1,870.90 and 913.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.14 : 1,870.90 = 913.27 : x
2. Step 2: Convert to fraction form
   1,356.14/1,870.90 = 913.27/x
3. Step 3: Cross multiply
   1,356.14x = 1,870.90 × 913.27
4. Step 4: Simplify right side
   1,356.14x = 1,708,632.28
5. Step 5: Solve for x
   x = 1,708,632.28/1,356.14
6. Step 6: Final answer
   x = 1,259.93