Finding the Fourth Proportional to 1,799.15, 2,482.89 and 991.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,799.15 : 2,482.89 = 991.57 : x
2. Step 2: Convert to fraction form
   1,799.15/2,482.89 = 991.57/x
3. Step 3: Cross multiply
   1,799.15x = 2,482.89 × 991.57
4. Step 4: Simplify right side
   1,799.15x = 2,461,953.03
5. Step 5: Solve for x
   x = 2,461,953.03/1,799.15
6. Step 6: Final answer
   x = 1,368.40