Finding the Fourth Proportional to 1,345.08, 1,858.50 and 1,170.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.08 : 1,858.50 = 1,170.12 : x
2. Step 2: Convert to fraction form
   1,345.08/1,858.50 = 1,170.12/x
3. Step 3: Cross multiply
   1,345.08x = 1,858.50 × 1,170.12
4. Step 4: Simplify right side
   1,345.08x = 2,174,668.02
5. Step 5: Solve for x
   x = 2,174,668.02/1,345.08
6. Step 6: Final answer
   x = 1,616.76