Finding the Fourth Proportional to 1,362.09, 1,878.61 and 913.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.09 : 1,878.61 = 913.81 : x
2. Step 2: Convert to fraction form
   1,362.09/1,878.61 = 913.81/x
3. Step 3: Cross multiply
   1,362.09x = 1,878.61 × 913.81
4. Step 4: Simplify right side
   1,362.09x = 1,716,692.60
5. Step 5: Solve for x
   x = 1,716,692.60/1,362.09
6. Step 6: Final answer
   x = 1,260.34