Finding the Fourth Proportional to 1,372.60, 2,059.98 and 1,225.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.60 : 2,059.98 = 1,225.72 : x
2. Step 2: Convert to fraction form
   1,372.60/2,059.98 = 1,225.72/x
3. Step 3: Cross multiply
   1,372.60x = 2,059.98 × 1,225.72
4. Step 4: Simplify right side
   1,372.60x = 2,524,958.69
5. Step 5: Solve for x
   x = 2,524,958.69/1,372.60
6. Step 6: Final answer
   x = 1,839.54