Finding the Fourth Proportional to 1,210.65, 1,667.69 and 1,134.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210.65 : 1,667.69 = 1,134.10 : x
2. Step 2: Convert to fraction form
   1,210.65/1,667.69 = 1,134.10/x
3. Step 3: Cross multiply
   1,210.65x = 1,667.69 × 1,134.10
4. Step 4: Simplify right side
   1,210.65x = 1,891,327.90
5. Step 5: Solve for x
   x = 1,891,327.90/1,210.65
6. Step 6: Final answer
   x = 1,562.25