Finding the Fourth Proportional to 1,877.30, 2,811.83 and 1,216.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.30 : 2,811.83 = 1,216.86 : x
2. Step 2: Convert to fraction form
   1,877.30/2,811.83 = 1,216.86/x
3. Step 3: Cross multiply
   1,877.30x = 2,811.83 × 1,216.86
4. Step 4: Simplify right side
   1,877.30x = 3,421,603.45
5. Step 5: Solve for x
   x = 3,421,603.45/1,877.30
6. Step 6: Final answer
   x = 1,822.62