Finding the Fourth Proportional to 2,078.64, 2,870.46 and 1,553.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.64 : 2,870.46 = 1,553.76 : x
2. Step 2: Convert to fraction form
   2,078.64/2,870.46 = 1,553.76/x
3. Step 3: Cross multiply
   2,078.64x = 2,870.46 × 1,553.76
4. Step 4: Simplify right side
   2,078.64x = 4,460,005.93
5. Step 5: Solve for x
   x = 4,460,005.93/2,078.64
6. Step 6: Final answer
   x = 2,145.64