Finding the Fourth Proportional to 1,003.83, 1,385.37 and 561.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.83 : 1,385.37 = 561.93 : x
2. Step 2: Convert to fraction form
   1,003.83/1,385.37 = 561.93/x
3. Step 3: Cross multiply
   1,003.83x = 1,385.37 × 561.93
4. Step 4: Simplify right side
   1,003.83x = 778,480.96
5. Step 5: Solve for x
   x = 778,480.96/1,003.83
6. Step 6: Final answer
   x = 775.51