Finding the Fourth Proportional to 2,091.70, 2,886.42 and 1,160.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.70 : 2,886.42 = 1,160.20 : x
2. Step 2: Convert to fraction form
   2,091.70/2,886.42 = 1,160.20/x
3. Step 3: Cross multiply
   2,091.70x = 2,886.42 × 1,160.20
4. Step 4: Simplify right side
   2,091.70x = 3,348,824.48
5. Step 5: Solve for x
   x = 3,348,824.48/2,091.70
6. Step 6: Final answer
   x = 1,601.01