Finding the Fourth Proportional to 3,685.42, 5,085.48 and 2,091.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.42 : 5,085.48 = 2,091.88 : x
2. Step 2: Convert to fraction form
   3,685.42/5,085.48 = 2,091.88/x
3. Step 3: Cross multiply
   3,685.42x = 5,085.48 × 2,091.88
4. Step 4: Simplify right side
   3,685.42x = 10,638,213.90
5. Step 5: Solve for x
   x = 10,638,213.90/3,685.42
6. Step 6: Final answer
   x = 2,886.57