Finding the Fourth Proportional to 3,695.60, 5,099.72 and 2,123.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,695.60 : 5,099.72 = 2,123.70 : x
2. Step 2: Convert to fraction form
   3,695.60/5,099.72 = 2,123.70/x
3. Step 3: Cross multiply
   3,695.60x = 5,099.72 × 2,123.70
4. Step 4: Simplify right side
   3,695.60x = 10,830,264.75
5. Step 5: Solve for x
   x = 10,830,264.75/3,695.60
6. Step 6: Final answer
   x = 2,930.59