Finding the Fourth Proportional to 1,427.16, 2,139.53 and 1,359.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.16 : 2,139.53 = 1,359.12 : x
2. Step 2: Convert to fraction form
   1,427.16/2,139.53 = 1,359.12/x
3. Step 3: Cross multiply
   1,427.16x = 2,139.53 × 1,359.12
4. Step 4: Simplify right side
   1,427.16x = 2,907,871.22
5. Step 5: Solve for x
   x = 2,907,871.22/1,427.16
6. Step 6: Final answer
   x = 2,037.52