Finding the Fourth Proportional to 1,991.71, 2,748.62 and 1,152.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.71 : 2,748.62 = 1,152.34 : x
2. Step 2: Convert to fraction form
   1,991.71/2,748.62 = 1,152.34/x
3. Step 3: Cross multiply
   1,991.71x = 2,748.62 × 1,152.34
4. Step 4: Simplify right side
   1,991.71x = 3,167,340.78
5. Step 5: Solve for x
   x = 3,167,340.78/1,991.71
6. Step 6: Final answer
   x = 1,590.26