Finding the Fourth Proportional to 2,118.76, 3,175.70 and 819.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.76 : 3,175.70 = 819.52 : x
2. Step 2: Convert to fraction form
   2,118.76/3,175.70 = 819.52/x
3. Step 3: Cross multiply
   2,118.76x = 3,175.70 × 819.52
4. Step 4: Simplify right side
   2,118.76x = 2,602,543.77
5. Step 5: Solve for x
   x = 2,602,543.77/2,118.76
6. Step 6: Final answer
   x = 1,228.33