Finding the Fourth Proportional to 1,047.72, 1,445.86 and 575.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.72 : 1,445.86 = 575.63 : x
2. Step 2: Convert to fraction form
   1,047.72/1,445.86 = 575.63/x
3. Step 3: Cross multiply
   1,047.72x = 1,445.86 × 575.63
4. Step 4: Simplify right side
   1,047.72x = 832,280.39
5. Step 5: Solve for x
   x = 832,280.39/1,047.72
6. Step 6: Final answer
   x = 794.37