Finding the Fourth Proportional to 1,428.41, 2,141.72 and 802.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.41 : 2,141.72 = 802.68 : x
2. Step 2: Convert to fraction form
   1,428.41/2,141.72 = 802.68/x
3. Step 3: Cross multiply
   1,428.41x = 2,141.72 × 802.68
4. Step 4: Simplify right side
   1,428.41x = 1,719,111.80
5. Step 5: Solve for x
   x = 1,719,111.80/1,428.41
6. Step 6: Final answer
   x = 1,203.52