Finding the Fourth Proportional to 1,896.21, 2,616.72 and 1,056.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,896.21 : 2,616.72 = 1,056.98 : x
2. Step 2: Convert to fraction form
   1,896.21/2,616.72 = 1,056.98/x
3. Step 3: Cross multiply
   1,896.21x = 2,616.72 × 1,056.98
4. Step 4: Simplify right side
   1,896.21x = 2,765,823.28
5. Step 5: Solve for x
   x = 2,765,823.28/1,896.21
6. Step 6: Final answer
   x = 1,458.61