Finding the Fourth Proportional to 1,802.32, 2,704.29 and 878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.32 : 2,704.29 = 878.72 : x
2. Step 2: Convert to fraction form
   1,802.32/2,704.29 = 878.72/x
3. Step 3: Cross multiply
   1,802.32x = 2,704.29 × 878.72
4. Step 4: Simplify right side
   1,802.32x = 2,376,296.89
5. Step 5: Solve for x
   x = 2,376,296.89/1,802.32
6. Step 6: Final answer
   x = 1,318.47