Finding the Fourth Proportional to 1,300.36, 1,950.72 and 434.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.36 : 1,950.72 = 434.56 : x
2. Step 2: Convert to fraction form
   1,300.36/1,950.72 = 434.56/x
3. Step 3: Cross multiply
   1,300.36x = 1,950.72 × 434.56
4. Step 4: Simplify right side
   1,300.36x = 847,704.88
5. Step 5: Solve for x
   x = 847,704.88/1,300.36
6. Step 6: Final answer
   x = 651.90