Finding the Fourth Proportional to 1,109.04, 1,530.45 and 636.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.04 : 1,530.45 = 636.93 : x
2. Step 2: Convert to fraction form
   1,109.04/1,530.45 = 636.93/x
3. Step 3: Cross multiply
   1,109.04x = 1,530.45 × 636.93
4. Step 4: Simplify right side
   1,109.04x = 974,789.52
5. Step 5: Solve for x
   x = 974,789.52/1,109.04
6. Step 6: Final answer
   x = 878.95