Finding the Fourth Proportional to 1,160.32, 1,601.18 and 636.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.32 : 1,601.18 = 636.34 : x
2. Step 2: Convert to fraction form
   1,160.32/1,601.18 = 636.34/x
3. Step 3: Cross multiply
   1,160.32x = 1,601.18 × 636.34
4. Step 4: Simplify right side
   1,160.32x = 1,018,886.88
5. Step 5: Solve for x
   x = 1,018,886.88/1,160.32
6. Step 6: Final answer
   x = 878.11