Finding the Fourth Proportional to 1,047.61, 1,569.39 and 636.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.61 : 1,569.39 = 636.94 : x
2. Step 2: Convert to fraction form
   1,047.61/1,569.39 = 636.94/x
3. Step 3: Cross multiply
   1,047.61x = 1,569.39 × 636.94
4. Step 4: Simplify right side
   1,047.61x = 999,607.27
5. Step 5: Solve for x
   x = 999,607.27/1,047.61
6. Step 6: Final answer
   x = 954.18