Finding the Fourth Proportional to 1,430.37, 1,983.94 and 1,372.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.37 : 1,983.94 = 1,372.05 : x
2. Step 2: Convert to fraction form
   1,430.37/1,983.94 = 1,372.05/x
3. Step 3: Cross multiply
   1,430.37x = 1,983.94 × 1,372.05
4. Step 4: Simplify right side
   1,430.37x = 2,722,061.45
5. Step 5: Solve for x
   x = 2,722,061.45/1,430.37
6. Step 6: Final answer
   x = 1,903.05