Finding the Fourth Proportional to 1,042.88, 1,564.78 and 555.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.88 : 1,564.78 = 555.82 : x
2. Step 2: Convert to fraction form
   1,042.88/1,564.78 = 555.82/x
3. Step 3: Cross multiply
   1,042.88x = 1,564.78 × 555.82
4. Step 4: Simplify right side
   1,042.88x = 869,736.02
5. Step 5: Solve for x
   x = 869,736.02/1,042.88
6. Step 6: Final answer
   x = 833.98