Finding the Fourth Proportional to 1,345.95, 2,015.33 and 856.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.95 : 2,015.33 = 856.35 : x
2. Step 2: Convert to fraction form
   1,345.95/2,015.33 = 856.35/x
3. Step 3: Cross multiply
   1,345.95x = 2,015.33 × 856.35
4. Step 4: Simplify right side
   1,345.95x = 1,725,823.56
5. Step 5: Solve for x
   x = 1,725,823.56/1,345.95
6. Step 6: Final answer
   x = 1,282.23