Finding the Fourth Proportional to 1,940.88, 2,677.20 and 1,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.88 : 2,677.20 = 1,242.72 : x
2. Step 2: Convert to fraction form
   1,940.88/2,677.20 = 1,242.72/x
3. Step 3: Cross multiply
   1,940.88x = 2,677.20 × 1,242.72
4. Step 4: Simplify right side
   1,940.88x = 3,327,009.98
5. Step 5: Solve for x
   x = 3,327,009.98/1,940.88
6. Step 6: Final answer
   x = 1,714.18