Finding the Fourth Proportional to 1,598.96, 2,393.31 and 856.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,598.96 : 2,393.31 = 856.72 : x
2. Step 2: Convert to fraction form
   1,598.96/2,393.31 = 856.72/x
3. Step 3: Cross multiply
   1,598.96x = 2,393.31 × 856.72
4. Step 4: Simplify right side
   1,598.96x = 2,050,402.75
5. Step 5: Solve for x
   x = 2,050,402.75/1,598.96
6. Step 6: Final answer
   x = 1,282.33