Finding the Fourth Proportional to 1,428.54, 1,971.39 and 799.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.54 : 1,971.39 = 799.10 : x
2. Step 2: Convert to fraction form
   1,428.54/1,971.39 = 799.10/x
3. Step 3: Cross multiply
   1,428.54x = 1,971.39 × 799.10
4. Step 4: Simplify right side
   1,428.54x = 1,575,338.28
5. Step 5: Solve for x
   x = 1,575,338.28/1,428.54
6. Step 6: Final answer
   x = 1,102.76