Finding the Fourth Proportional to 1,361.89, 1,880 and 1,030.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.89 : 1,880 = 1,030.42 : x
2. Step 2: Convert to fraction form
   1,361.89/1,880 = 1,030.42/x
3. Step 3: Cross multiply
   1,361.89x = 1,880 × 1,030.42
4. Step 4: Simplify right side
   1,361.89x = 1,937,189.60
5. Step 5: Solve for x
   x = 1,937,189.60/1,361.89
6. Step 6: Final answer
   x = 1,422.43