Finding the Fourth Proportional to 2,090.42, 3,133.20 and 1,680.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.42 : 3,133.20 = 1,680.02 : x
2. Step 2: Convert to fraction form
   2,090.42/3,133.20 = 1,680.02/x
3. Step 3: Cross multiply
   2,090.42x = 3,133.20 × 1,680.02
4. Step 4: Simplify right side
   2,090.42x = 5,263,838.66
5. Step 5: Solve for x
   x = 5,263,838.66/2,090.42
6. Step 6: Final answer
   x = 2,518.08