Finding the Fourth Proportional to 1,053.56, 1,453.86 and 587.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.56 : 1,453.86 = 587.72 : x
2. Step 2: Convert to fraction form
   1,053.56/1,453.86 = 587.72/x
3. Step 3: Cross multiply
   1,053.56x = 1,453.86 × 587.72
4. Step 4: Simplify right side
   1,053.56x = 854,462.60
5. Step 5: Solve for x
   x = 854,462.60/1,053.56
6. Step 6: Final answer
   x = 811.02