Finding the Fourth Proportional to 1,349.86, 1,861.41 and 956.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.86 : 1,861.41 = 956.74 : x
2. Step 2: Convert to fraction form
   1,349.86/1,861.41 = 956.74/x
3. Step 3: Cross multiply
   1,349.86x = 1,861.41 × 956.74
4. Step 4: Simplify right side
   1,349.86x = 1,780,885.40
5. Step 5: Solve for x
   x = 1,780,885.40/1,349.86
6. Step 6: Final answer
   x = 1,319.31