Finding the Fourth Proportional to 2,127.30, 2,928.72 and 1,678.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,127.30 : 2,928.72 = 1,678.35 : x
2. Step 2: Convert to fraction form
   2,127.30/2,928.72 = 1,678.35/x
3. Step 3: Cross multiply
   2,127.30x = 2,928.72 × 1,678.35
4. Step 4: Simplify right side
   2,127.30x = 4,915,417.21
5. Step 5: Solve for x
   x = 4,915,417.21/2,127.30
6. Step 6: Final answer
   x = 2,310.64