Finding the Fourth Proportional to 1,477.31, 2,198.52 and 1,428.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,477.31 : 2,198.52 = 1,428.09 : x
2. Step 2: Convert to fraction form
   1,477.31/2,198.52 = 1,428.09/x
3. Step 3: Cross multiply
   1,477.31x = 2,198.52 × 1,428.09
4. Step 4: Simplify right side
   1,477.31x = 3,139,684.43
5. Step 5: Solve for x
   x = 3,139,684.43/1,477.31
6. Step 6: Final answer
   x = 2,125.28