Finding the Fourth Proportional to 1,370.30, 1,888.25 and 1,055.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.30 : 1,888.25 = 1,055.61 : x
2. Step 2: Convert to fraction form
   1,370.30/1,888.25 = 1,055.61/x
3. Step 3: Cross multiply
   1,370.30x = 1,888.25 × 1,055.61
4. Step 4: Simplify right side
   1,370.30x = 1,993,250.30
5. Step 5: Solve for x
   x = 1,993,250.30/1,370.30
6. Step 6: Final answer
   x = 1,454.61