Finding the Fourth Proportional to 1,870.63, 2,801.05 and 1,211.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.63 : 2,801.05 = 1,211.49 : x
2. Step 2: Convert to fraction form
   1,870.63/2,801.05 = 1,211.49/x
3. Step 3: Cross multiply
   1,870.63x = 2,801.05 × 1,211.49
4. Step 4: Simplify right side
   1,870.63x = 3,393,441.04
5. Step 5: Solve for x
   x = 3,393,441.04/1,870.63
6. Step 6: Final answer
   x = 1,814.07