Finding the Fourth Proportional to 2,111.32, 2,909.28 and 1,613.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.32 : 2,909.28 = 1,613.98 : x
2. Step 2: Convert to fraction form
   2,111.32/2,909.28 = 1,613.98/x
3. Step 3: Cross multiply
   2,111.32x = 2,909.28 × 1,613.98
4. Step 4: Simplify right side
   2,111.32x = 4,695,519.73
5. Step 5: Solve for x
   x = 4,695,519.73/2,111.32
6. Step 6: Final answer
   x = 2,223.97