Finding the Fourth Proportional to 1,353.07, 1,867.59 and 1,212.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.07 : 1,867.59 = 1,212.94 : x
2. Step 2: Convert to fraction form
   1,353.07/1,867.59 = 1,212.94/x
3. Step 3: Cross multiply
   1,353.07x = 1,867.59 × 1,212.94
4. Step 4: Simplify right side
   1,353.07x = 2,265,274.61
5. Step 5: Solve for x
   x = 2,265,274.61/1,353.07
6. Step 6: Final answer
   x = 1,674.17