Finding the Fourth Proportional to 1,406.60, 2,099.86 and 1,222.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.60 : 2,099.86 = 1,222.12 : x
2. Step 2: Convert to fraction form
   1,406.60/2,099.86 = 1,222.12/x
3. Step 3: Cross multiply
   1,406.60x = 2,099.86 × 1,222.12
4. Step 4: Simplify right side
   1,406.60x = 2,566,280.47
5. Step 5: Solve for x
   x = 2,566,280.47/1,406.60
6. Step 6: Final answer
   x = 1,824.46