Finding the Fourth Proportional to 3,700.23, 5,106.27 and 2,128.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.23 : 5,106.27 = 2,128.35 : x
2. Step 2: Convert to fraction form
   3,700.23/5,106.27 = 2,128.35/x
3. Step 3: Cross multiply
   3,700.23x = 5,106.27 × 2,128.35
4. Step 4: Simplify right side
   3,700.23x = 10,867,929.75
5. Step 5: Solve for x
   x = 10,867,929.75/3,700.23
6. Step 6: Final answer
   x = 2,937.10