Finding the Fourth Proportional to 2,373.57, 3,561.17 and 1,278.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,373.57 : 3,561.17 = 1,278.05 : x
2. Step 2: Convert to fraction form
   2,373.57/3,561.17 = 1,278.05/x
3. Step 3: Cross multiply
   2,373.57x = 3,561.17 × 1,278.05
4. Step 4: Simplify right side
   2,373.57x = 4,551,329.12
5. Step 5: Solve for x
   x = 4,551,329.12/2,373.57
6. Step 6: Final answer
   x = 1,917.50