Finding the Fourth Proportional to 1,426.54, 1,967.70 and 1,007.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.54 : 1,967.70 = 1,007.50 : x
2. Step 2: Convert to fraction form
   1,426.54/1,967.70 = 1,007.50/x
3. Step 3: Cross multiply
   1,426.54x = 1,967.70 × 1,007.50
4. Step 4: Simplify right side
   1,426.54x = 1,982,457.75
5. Step 5: Solve for x
   x = 1,982,457.75/1,426.54
6. Step 6: Final answer
   x = 1,389.70