Finding the Fourth Proportional to 3,870.78, 5,804.39 and 1,237.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.78 : 5,804.39 = 1,237.77 : x
2. Step 2: Convert to fraction form
   3,870.78/5,804.39 = 1,237.77/x
3. Step 3: Cross multiply
   3,870.78x = 5,804.39 × 1,237.77
4. Step 4: Simplify right side
   3,870.78x = 7,184,499.81
5. Step 5: Solve for x
   x = 7,184,499.81/3,870.78
6. Step 6: Final answer
   x = 1,856.09