Finding the Fourth Proportional to 1,345.93, 1,856.76 and 786.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.93 : 1,856.76 = 786.42 : x
2. Step 2: Convert to fraction form
   1,345.93/1,856.76 = 786.42/x
3. Step 3: Cross multiply
   1,345.93x = 1,856.76 × 786.42
4. Step 4: Simplify right side
   1,345.93x = 1,460,190.25
5. Step 5: Solve for x
   x = 1,460,190.25/1,345.93
6. Step 6: Final answer
   x = 1,084.90