Finding the Fourth Proportional to 1,419.89, 2,130.18 and 1,128.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.89 : 2,130.18 = 1,128.49 : x
2. Step 2: Convert to fraction form
   1,419.89/2,130.18 = 1,128.49/x
3. Step 3: Cross multiply
   1,419.89x = 2,130.18 × 1,128.49
4. Step 4: Simplify right side
   1,419.89x = 2,403,881.50
5. Step 5: Solve for x
   x = 2,403,881.50/1,419.89
6. Step 6: Final answer
   x = 1,693.01