Finding the Fourth Proportional to 1,415.70, 1,951.61 and 1,022.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.70 : 1,951.61 = 1,022.10 : x
2. Step 2: Convert to fraction form
   1,415.70/1,951.61 = 1,022.10/x
3. Step 3: Cross multiply
   1,415.70x = 1,951.61 × 1,022.10
4. Step 4: Simplify right side
   1,415.70x = 1,994,740.58
5. Step 5: Solve for x
   x = 1,994,740.58/1,415.70
6. Step 6: Final answer
   x = 1,409.01