Finding the Fourth Proportional to 1,053.61, 1,580.69 and 591.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.61 : 1,580.69 = 591.73 : x
2. Step 2: Convert to fraction form
   1,053.61/1,580.69 = 591.73/x
3. Step 3: Cross multiply
   1,053.61x = 1,580.69 × 591.73
4. Step 4: Simplify right side
   1,053.61x = 935,341.69
5. Step 5: Solve for x
   x = 935,341.69/1,053.61
6. Step 6: Final answer
   x = 887.75