Finding the Fourth Proportional to 1,300.28, 1,949.87 and 434.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.28 : 1,949.87 = 434.39 : x
2. Step 2: Convert to fraction form
   1,300.28/1,949.87 = 434.39/x
3. Step 3: Cross multiply
   1,300.28x = 1,949.87 × 434.39
4. Step 4: Simplify right side
   1,300.28x = 846,992.11
5. Step 5: Solve for x
   x = 846,992.11/1,300.28
6. Step 6: Final answer
   x = 651.39