Finding the Fourth Proportional to 1,345.48, 1,856.80 and 786.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.48 : 1,856.80 = 786.04 : x
2. Step 2: Convert to fraction form
   1,345.48/1,856.80 = 786.04/x
3. Step 3: Cross multiply
   1,345.48x = 1,856.80 × 786.04
4. Step 4: Simplify right side
   1,345.48x = 1,459,519.07
5. Step 5: Solve for x
   x = 1,459,519.07/1,345.48
6. Step 6: Final answer
   x = 1,084.76