Finding the Fourth Proportional to 1,991.88, 2,748.65 and 1,152.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.88 : 2,748.65 = 1,152.59 : x
2. Step 2: Convert to fraction form
   1,991.88/2,748.65 = 1,152.59/x
3. Step 3: Cross multiply
   1,991.88x = 2,748.65 × 1,152.59
4. Step 4: Simplify right side
   1,991.88x = 3,168,047.00
5. Step 5: Solve for x
   x = 3,168,047.00/1,991.88
6. Step 6: Final answer
   x = 1,590.48