Finding the Fourth Proportional to 1,678.77, 2,315.93 and 1,048.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.77 : 2,315.93 = 1,048.89 : x
2. Step 2: Convert to fraction form
   1,678.77/2,315.93 = 1,048.89/x
3. Step 3: Cross multiply
   1,678.77x = 2,315.93 × 1,048.89
4. Step 4: Simplify right side
   1,678.77x = 2,429,150.57
5. Step 5: Solve for x
   x = 2,429,150.57/1,678.77
6. Step 6: Final answer
   x = 1,446.98