Finding the Fourth Proportional to 2,651.86, 3,978.44 and 1,873.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,651.86 : 3,978.44 = 1,873.39 : x
2. Step 2: Convert to fraction form
   2,651.86/3,978.44 = 1,873.39/x
3. Step 3: Cross multiply
   2,651.86x = 3,978.44 × 1,873.39
4. Step 4: Simplify right side
   2,651.86x = 7,453,140.45
5. Step 5: Solve for x
   x = 7,453,140.45/2,651.86
6. Step 6: Final answer
   x = 2,810.54