Finding the Fourth Proportional to 3,700.46, 5,106.43 and 2,128.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,700.46 : 5,106.43 = 2,128.58 : x
2. Step 2: Convert to fraction form
   3,700.46/5,106.43 = 2,128.58/x
3. Step 3: Cross multiply
   3,700.46x = 5,106.43 × 2,128.58
4. Step 4: Simplify right side
   3,700.46x = 10,869,444.77
5. Step 5: Solve for x
   x = 10,869,444.77/3,700.46
6. Step 6: Final answer
   x = 2,937.32