Finding the Fourth Proportional to 1,056.61, 1,581.86 and 797.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.61 : 1,581.86 = 797.68 : x
2. Step 2: Convert to fraction form
   1,056.61/1,581.86 = 797.68/x
3. Step 3: Cross multiply
   1,056.61x = 1,581.86 × 797.68
4. Step 4: Simplify right side
   1,056.61x = 1,261,814.10
5. Step 5: Solve for x
   x = 1,261,814.10/1,056.61
6. Step 6: Final answer
   x = 1,194.21