Finding the Fourth Proportional to 1,677.40, 2,315.94 and 1,283.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.40 : 2,315.94 = 1,283.72 : x
2. Step 2: Convert to fraction form
   1,677.40/2,315.94 = 1,283.72/x
3. Step 3: Cross multiply
   1,677.40x = 2,315.94 × 1,283.72
4. Step 4: Simplify right side
   1,677.40x = 2,973,018.50
5. Step 5: Solve for x
   x = 2,973,018.50/1,677.40
6. Step 6: Final answer
   x = 1,772.40