Finding the Fourth Proportional to 1,570.10, 2,165.53 and 1,150.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.10 : 2,165.53 = 1,150.30 : x
2. Step 2: Convert to fraction form
   1,570.10/2,165.53 = 1,150.30/x
3. Step 3: Cross multiply
   1,570.10x = 2,165.53 × 1,150.30
4. Step 4: Simplify right side
   1,570.10x = 2,490,992.58
5. Step 5: Solve for x
   x = 2,490,992.58/1,570.10
6. Step 6: Final answer
   x = 1,586.52