Finding the Fourth Proportional to 1,085.51, 1,498.24 and 637.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.51 : 1,498.24 = 637.58 : x
2. Step 2: Convert to fraction form
   1,085.51/1,498.24 = 637.58/x
3. Step 3: Cross multiply
   1,085.51x = 1,498.24 × 637.58
4. Step 4: Simplify right side
   1,085.51x = 955,240.37
5. Step 5: Solve for x
   x = 955,240.37/1,085.51
6. Step 6: Final answer
   x = 880.00