Finding the Fourth Proportional to 1,161.89, 1,603.37 and 637.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,161.89 : 1,603.37 = 637.93 : x
2. Step 2: Convert to fraction form
   1,161.89/1,603.37 = 637.93/x
3. Step 3: Cross multiply
   1,161.89x = 1,603.37 × 637.93
4. Step 4: Simplify right side
   1,161.89x = 1,022,830.61
5. Step 5: Solve for x
   x = 1,022,830.61/1,161.89
6. Step 6: Final answer
   x = 880.31