Finding the Fourth Proportional to 1,378.56, 1,897.92 and 1,235.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.56 : 1,897.92 = 1,235.52 : x
2. Step 2: Convert to fraction form
   1,378.56/1,897.92 = 1,235.52/x
3. Step 3: Cross multiply
   1,378.56x = 1,897.92 × 1,235.52
4. Step 4: Simplify right side
   1,378.56x = 2,344,918.12
5. Step 5: Solve for x
   x = 2,344,918.12/1,378.56
6. Step 6: Final answer
   x = 1,700.99