Finding the Fourth Proportional to 3,695.76, 5,100.60 and 2,123.85

Step by Step Solution

1. Step 1: Write the proportion equation
   3,695.76 : 5,100.60 = 2,123.85 : x
2. Step 2: Convert to fraction form
   3,695.76/5,100.60 = 2,123.85/x
3. Step 3: Cross multiply
   3,695.76x = 5,100.60 × 2,123.85
4. Step 4: Simplify right side
   3,695.76x = 10,832,909.31
5. Step 5: Solve for x
   x = 10,832,909.31/3,695.76
6. Step 6: Final answer
   x = 2,931.17