Finding the Fourth Proportional to 1,109.25, 1,530.98 and 637.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.25 : 1,530.98 = 637.46 : x
2. Step 2: Convert to fraction form
   1,109.25/1,530.98 = 637.46/x
3. Step 3: Cross multiply
   1,109.25x = 1,530.98 × 637.46
4. Step 4: Simplify right side
   1,109.25x = 975,938.51
5. Step 5: Solve for x
   x = 975,938.51/1,109.25
6. Step 6: Final answer
   x = 879.82