Finding the Fourth Proportional to 1,053.69, 1,580.55 and 475.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.69 : 1,580.55 = 475.89 : x
2. Step 2: Convert to fraction form
   1,053.69/1,580.55 = 475.89/x
3. Step 3: Cross multiply
   1,053.69x = 1,580.55 × 475.89
4. Step 4: Simplify right side
   1,053.69x = 752,160.23
5. Step 5: Solve for x
   x = 752,160.23/1,053.69
6. Step 6: Final answer
   x = 713.84