Finding the Fourth Proportional to 1,399.86, 2,099.61 and 475.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.86 : 2,099.61 = 475.38 : x
2. Step 2: Convert to fraction form
   1,399.86/2,099.61 = 475.38/x
3. Step 3: Cross multiply
   1,399.86x = 2,099.61 × 475.38
4. Step 4: Simplify right side
   1,399.86x = 998,112.60
5. Step 5: Solve for x
   x = 998,112.60/1,399.86
6. Step 6: Final answer
   x = 713.01