Finding the Fourth Proportional to 1,386.81, 1,899.23 and 1,368.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.81 : 1,899.23 = 1,368.59 : x
2. Step 2: Convert to fraction form
   1,386.81/1,899.23 = 1,368.59/x
3. Step 3: Cross multiply
   1,386.81x = 1,899.23 × 1,368.59
4. Step 4: Simplify right side
   1,386.81x = 2,599,250.85
5. Step 5: Solve for x
   x = 2,599,250.85/1,386.81
6. Step 6: Final answer
   x = 1,874.27