Finding the Fourth Proportional to 1,368.94, 1,889.43 and 802.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.94 : 1,889.43 = 802.15 : x
2. Step 2: Convert to fraction form
   1,368.94/1,889.43 = 802.15/x
3. Step 3: Cross multiply
   1,368.94x = 1,889.43 × 802.15
4. Step 4: Simplify right side
   1,368.94x = 1,515,592.82
5. Step 5: Solve for x
   x = 1,515,592.82/1,368.94
6. Step 6: Final answer
   x = 1,107.13