Finding the Fourth Proportional to 1,991.58, 2,748.08 and 1,152.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.58 : 2,748.08 = 1,152.12 : x
2. Step 2: Convert to fraction form
   1,991.58/2,748.08 = 1,152.12/x
3. Step 3: Cross multiply
   1,991.58x = 2,748.08 × 1,152.12
4. Step 4: Simplify right side
   1,991.58x = 3,166,112.17
5. Step 5: Solve for x
   x = 3,166,112.17/1,991.58
6. Step 6: Final answer
   x = 1,589.75