Finding the Fourth Proportional to 1,056.52, 1,457.98 and 590.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.52 : 1,457.98 = 590.80 : x
2. Step 2: Convert to fraction form
   1,056.52/1,457.98 = 590.80/x
3. Step 3: Cross multiply
   1,056.52x = 1,457.98 × 590.80
4. Step 4: Simplify right side
   1,056.52x = 861,374.58
5. Step 5: Solve for x
   x = 861,374.58/1,056.52
6. Step 6: Final answer
   x = 815.29