Finding the Fourth Proportional to 2,672.67, 3,688.50 and 1,538.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.67 : 3,688.50 = 1,538.70 : x
2. Step 2: Convert to fraction form
   2,672.67/3,688.50 = 1,538.70/x
3. Step 3: Cross multiply
   2,672.67x = 3,688.50 × 1,538.70
4. Step 4: Simplify right side
   2,672.67x = 5,675,480.40
5. Step 5: Solve for x
   x = 5,675,480.40/2,672.67
6. Step 6: Final answer
   x = 2,123.52