Finding the Fourth Proportional to 1,780.83, 2,667.60 and 1,048.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.83 : 2,667.60 = 1,048.19 : x
2. Step 2: Convert to fraction form
   1,780.83/2,667.60 = 1,048.19/x
3. Step 3: Cross multiply
   1,780.83x = 2,667.60 × 1,048.19
4. Step 4: Simplify right side
   1,780.83x = 2,796,138.31
5. Step 5: Solve for x
   x = 2,796,138.31/1,780.83
6. Step 6: Final answer
   x = 1,570.13