Finding the Fourth Proportional to 1,370.31, 1,891.52 and 1,055.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.31 : 1,891.52 = 1,055.62 : x
2. Step 2: Convert to fraction form
   1,370.31/1,891.52 = 1,055.62/x
3. Step 3: Cross multiply
   1,370.31x = 1,891.52 × 1,055.62
4. Step 4: Simplify right side
   1,370.31x = 1,996,726.34
5. Step 5: Solve for x
   x = 1,996,726.34/1,370.31
6. Step 6: Final answer
   x = 1,457.13