Finding the Fourth Proportional to 1,351.61, 1,860.94 and 1,222.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.61 : 1,860.94 = 1,222.01 : x
2. Step 2: Convert to fraction form
   1,351.61/1,860.94 = 1,222.01/x
3. Step 3: Cross multiply
   1,351.61x = 1,860.94 × 1,222.01
4. Step 4: Simplify right side
   1,351.61x = 2,274,087.29
5. Step 5: Solve for x
   x = 2,274,087.29/1,351.61
6. Step 6: Final answer
   x = 1,682.50