Finding the Fourth Proportional to 1,819.02, 2,510.27 and 991.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,819.02 : 2,510.27 = 991.02 : x
2. Step 2: Convert to fraction form
   1,819.02/2,510.27 = 991.02/x
3. Step 3: Cross multiply
   1,819.02x = 2,510.27 × 991.02
4. Step 4: Simplify right side
   1,819.02x = 2,487,727.78
5. Step 5: Solve for x
   x = 2,487,727.78/1,819.02
6. Step 6: Final answer
   x = 1,367.62