Finding the Fourth Proportional to 1,109.84, 1,531.59 and 637.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.84 : 1,531.59 = 637.73 : x
2. Step 2: Convert to fraction form
   1,109.84/1,531.59 = 637.73/x
3. Step 3: Cross multiply
   1,109.84x = 1,531.59 × 637.73
4. Step 4: Simplify right side
   1,109.84x = 976,740.89
5. Step 5: Solve for x
   x = 976,740.89/1,109.84
6. Step 6: Final answer
   x = 880.07