Finding the Fourth Proportional to 1,095.69, 1,641.99 and 478.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.69 : 1,641.99 = 478.10 : x
2. Step 2: Convert to fraction form
   1,095.69/1,641.99 = 478.10/x
3. Step 3: Cross multiply
   1,095.69x = 1,641.99 × 478.10
4. Step 4: Simplify right side
   1,095.69x = 785,038.63
5. Step 5: Solve for x
   x = 785,038.63/1,095.69
6. Step 6: Final answer
   x = 716.48