Finding the Fourth Proportional to 1,817.72, 2,508.64 and 1,071.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,817.72 : 2,508.64 = 1,071.92 : x
2. Step 2: Convert to fraction form
   1,817.72/2,508.64 = 1,071.92/x
3. Step 3: Cross multiply
   1,817.72x = 2,508.64 × 1,071.92
4. Step 4: Simplify right side
   1,817.72x = 2,689,061.39
5. Step 5: Solve for x
   x = 2,689,061.39/1,817.72
6. Step 6: Final answer
   x = 1,479.36