Finding the Fourth Proportional to 2,830.94, 4,245.60 and 1,187.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,830.94 : 4,245.60 = 1,187.45 : x
2. Step 2: Convert to fraction form
   2,830.94/4,245.60 = 1,187.45/x
3. Step 3: Cross multiply
   2,830.94x = 4,245.60 × 1,187.45
4. Step 4: Simplify right side
   2,830.94x = 5,041,437.72
5. Step 5: Solve for x
   x = 5,041,437.72/2,830.94
6. Step 6: Final answer
   x = 1,780.84