Finding the Fourth Proportional to 1,094.69, 1,642.50 and 478.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,094.69 : 1,642.50 = 478.55 : x
2. Step 2: Convert to fraction form
   1,094.69/1,642.50 = 478.55/x
3. Step 3: Cross multiply
   1,094.69x = 1,642.50 × 478.55
4. Step 4: Simplify right side
   1,094.69x = 786,018.38
5. Step 5: Solve for x
   x = 786,018.38/1,094.69
6. Step 6: Final answer
   x = 718.03