Finding the Fourth Proportional to 1,812.68, 2,500.52 and 1,222.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,812.68 : 2,500.52 = 1,222.19 : x
2. Step 2: Convert to fraction form
   1,812.68/2,500.52 = 1,222.19/x
3. Step 3: Cross multiply
   1,812.68x = 2,500.52 × 1,222.19
4. Step 4: Simplify right side
   1,812.68x = 3,056,091.93
5. Step 5: Solve for x
   x = 3,056,091.93/1,812.68
6. Step 6: Final answer
   x = 1,685.96