Finding the Fourth Proportional to 1,491.93, 2,058.86 and 828.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.93 : 2,058.86 = 828.76 : x
2. Step 2: Convert to fraction form
   1,491.93/2,058.86 = 828.76/x
3. Step 3: Cross multiply
   1,491.93x = 2,058.86 × 828.76
4. Step 4: Simplify right side
   1,491.93x = 1,706,300.81
5. Step 5: Solve for x
   x = 1,706,300.81/1,491.93
6. Step 6: Final answer
   x = 1,143.69