Finding the Fourth Proportional to 1,419.78, 1,958.40 and 947.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.78 : 1,958.40 = 947.82 : x
2. Step 2: Convert to fraction form
   1,419.78/1,958.40 = 947.82/x
3. Step 3: Cross multiply
   1,419.78x = 1,958.40 × 947.82
4. Step 4: Simplify right side
   1,419.78x = 1,856,210.69
5. Step 5: Solve for x
   x = 1,856,210.69/1,419.78
6. Step 6: Final answer
   x = 1,307.39