Finding the Fourth Proportional to 1,056.38, 1,457.93 and 590.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.38 : 1,457.93 = 590.72 : x
2. Step 2: Convert to fraction form
   1,056.38/1,457.93 = 590.72/x
3. Step 3: Cross multiply
   1,056.38x = 1,457.93 × 590.72
4. Step 4: Simplify right side
   1,056.38x = 861,222.60
5. Step 5: Solve for x
   x = 861,222.60/1,056.38
6. Step 6: Final answer
   x = 815.26