Finding the Fourth Proportional to 1,272.57, 1,899.69 and 1,108.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.57 : 1,899.69 = 1,108.50 : x
2. Step 2: Convert to fraction form
   1,272.57/1,899.69 = 1,108.50/x
3. Step 3: Cross multiply
   1,272.57x = 1,899.69 × 1,108.50
4. Step 4: Simplify right side
   1,272.57x = 2,105,806.37
5. Step 5: Solve for x
   x = 2,105,806.37/1,272.57
6. Step 6: Final answer
   x = 1,654.77