Finding the Fourth Proportional to 1,991.85, 2,748.80 and 1,152.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.85 : 2,748.80 = 1,152.62 : x
2. Step 2: Convert to fraction form
   1,991.85/2,748.80 = 1,152.62/x
3. Step 3: Cross multiply
   1,991.85x = 2,748.80 × 1,152.62
4. Step 4: Simplify right side
   1,991.85x = 3,168,321.86
5. Step 5: Solve for x
   x = 3,168,321.86/1,991.85
6. Step 6: Final answer
   x = 1,590.64