Finding the Fourth Proportional to 1,406.50, 1,938.78 and 963.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.50 : 1,938.78 = 963.70 : x
2. Step 2: Convert to fraction form
   1,406.50/1,938.78 = 963.70/x
3. Step 3: Cross multiply
   1,406.50x = 1,938.78 × 963.70
4. Step 4: Simplify right side
   1,406.50x = 1,868,402.29
5. Step 5: Solve for x
   x = 1,868,402.29/1,406.50
6. Step 6: Final answer
   x = 1,328.41