Finding the Fourth Proportional to 1,428.09, 1,973.33 and 1,114.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.09 : 1,973.33 = 1,114.14 : x
2. Step 2: Convert to fraction form
   1,428.09/1,973.33 = 1,114.14/x
3. Step 3: Cross multiply
   1,428.09x = 1,973.33 × 1,114.14
4. Step 4: Simplify right side
   1,428.09x = 2,198,565.89
5. Step 5: Solve for x
   x = 2,198,565.89/1,428.09
6. Step 6: Final answer
   x = 1,539.51