Finding the Fourth Proportional to 1,345.88, 1,857.74 and 786.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.88 : 1,857.74 = 786.14 : x
2. Step 2: Convert to fraction form
   1,345.88/1,857.74 = 786.14/x
3. Step 3: Cross multiply
   1,345.88x = 1,857.74 × 786.14
4. Step 4: Simplify right side
   1,345.88x = 1,460,443.72
5. Step 5: Solve for x
   x = 1,460,443.72/1,345.88
6. Step 6: Final answer
   x = 1,085.12