Finding the Fourth Proportional to 1,672.21, 2,310.52 and 1,613.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.21 : 2,310.52 = 1,613.08 : x
2. Step 2: Convert to fraction form
   1,672.21/2,310.52 = 1,613.08/x
3. Step 3: Cross multiply
   1,672.21x = 2,310.52 × 1,613.08
4. Step 4: Simplify right side
   1,672.21x = 3,727,053.60
5. Step 5: Solve for x
   x = 3,727,053.60/1,672.21
6. Step 6: Final answer
   x = 2,228.82