Finding the Fourth Proportional to 1,095.08, 1,640.78 and 477.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.08 : 1,640.78 = 477.86 : x
2. Step 2: Convert to fraction form
   1,095.08/1,640.78 = 477.86/x
3. Step 3: Cross multiply
   1,095.08x = 1,640.78 × 477.86
4. Step 4: Simplify right side
   1,095.08x = 784,063.13
5. Step 5: Solve for x
   x = 784,063.13/1,095.08
6. Step 6: Final answer
   x = 715.99