Finding the Fourth Proportional to 1,300.88, 1,950.83 and 423.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.88 : 1,950.83 = 423.15 : x
2. Step 2: Convert to fraction form
   1,300.88/1,950.83 = 423.15/x
3. Step 3: Cross multiply
   1,300.88x = 1,950.83 × 423.15
4. Step 4: Simplify right side
   1,300.88x = 825,490.17
5. Step 5: Solve for x
   x = 825,490.17/1,300.88
6. Step 6: Final answer
   x = 634.56