Finding the Fourth Proportional to 1,788.56, 2,468.16 and 991.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.56 : 2,468.16 = 991.94 : x
2. Step 2: Convert to fraction form
   1,788.56/2,468.16 = 991.94/x
3. Step 3: Cross multiply
   1,788.56x = 2,468.16 × 991.94
4. Step 4: Simplify right side
   1,788.56x = 2,448,266.63
5. Step 5: Solve for x
   x = 2,448,266.63/1,788.56
6. Step 6: Final answer
   x = 1,368.85