Finding the Fourth Proportional to 2,076.56, 3,115.64 and 921.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.56 : 3,115.64 = 921.52 : x
2. Step 2: Convert to fraction form
   2,076.56/3,115.64 = 921.52/x
3. Step 3: Cross multiply
   2,076.56x = 3,115.64 × 921.52
4. Step 4: Simplify right side
   2,076.56x = 2,871,124.57
5. Step 5: Solve for x
   x = 2,871,124.57/2,076.56
6. Step 6: Final answer
   x = 1,382.64