Finding the Fourth Proportional to 2,128.61, 2,938.83 and 1,457.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.61 : 2,938.83 = 1,457.53 : x
2. Step 2: Convert to fraction form
   2,128.61/2,938.83 = 1,457.53/x
3. Step 3: Cross multiply
   2,128.61x = 2,938.83 × 1,457.53
4. Step 4: Simplify right side
   2,128.61x = 4,283,438.44
5. Step 5: Solve for x
   x = 4,283,438.44/2,128.61
6. Step 6: Final answer
   x = 2,012.32