Finding the Fourth Proportional to 1,619.67, 2,235.60 and 956.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,619.67 : 2,235.60 = 956.89 : x
2. Step 2: Convert to fraction form
   1,619.67/2,235.60 = 956.89/x
3. Step 3: Cross multiply
   1,619.67x = 2,235.60 × 956.89
4. Step 4: Simplify right side
   1,619.67x = 2,139,219.79
5. Step 5: Solve for x
   x = 2,139,219.79/1,619.67
6. Step 6: Final answer
   x = 1,320.77