Finding the Fourth Proportional to 1,368.03, 1,887.58 and 870.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.03 : 1,887.58 = 870.49 : x
2. Step 2: Convert to fraction form
   1,368.03/1,887.58 = 870.49/x
3. Step 3: Cross multiply
   1,368.03x = 1,887.58 × 870.49
4. Step 4: Simplify right side
   1,368.03x = 1,643,119.51
5. Step 5: Solve for x
   x = 1,643,119.51/1,368.03
6. Step 6: Final answer
   x = 1,201.08