Finding the Fourth Proportional to 1,004.04, 1,385.56 and 561.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.04 : 1,385.56 = 561.98 : x
2. Step 2: Convert to fraction form
   1,004.04/1,385.56 = 561.98/x
3. Step 3: Cross multiply
   1,004.04x = 1,385.56 × 561.98
4. Step 4: Simplify right side
   1,004.04x = 778,657.01
5. Step 5: Solve for x
   x = 778,657.01/1,004.04
6. Step 6: Final answer
   x = 775.52