Finding the Fourth Proportional to 1,345.32, 1,856.36 and 785.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.32 : 1,856.36 = 785.75 : x
2. Step 2: Convert to fraction form
   1,345.32/1,856.36 = 785.75/x
3. Step 3: Cross multiply
   1,345.32x = 1,856.36 × 785.75
4. Step 4: Simplify right side
   1,345.32x = 1,458,627.55
5. Step 5: Solve for x
   x = 1,458,627.55/1,345.32
6. Step 6: Final answer
   x = 1,084.22