Finding the Fourth Proportional to 1,274.68, 1,909.86 and 1,079.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.68 : 1,909.86 = 1,079.50 : x
2. Step 2: Convert to fraction form
   1,274.68/1,909.86 = 1,079.50/x
3. Step 3: Cross multiply
   1,274.68x = 1,909.86 × 1,079.50
4. Step 4: Simplify right side
   1,274.68x = 2,061,693.87
5. Step 5: Solve for x
   x = 2,061,693.87/1,274.68
6. Step 6: Final answer
   x = 1,617.42