Finding the Fourth Proportional to 1,435.33, 1,980.46 and 938.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.33 : 1,980.46 = 938.70 : x
2. Step 2: Convert to fraction form
   1,435.33/1,980.46 = 938.70/x
3. Step 3: Cross multiply
   1,435.33x = 1,980.46 × 938.70
4. Step 4: Simplify right side
   1,435.33x = 1,859,057.80
5. Step 5: Solve for x
   x = 1,859,057.80/1,435.33
6. Step 6: Final answer
   x = 1,295.21