Finding the Fourth Proportional to 1,431.14, 1,972.86 and 1,010.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.14 : 1,972.86 = 1,010.12 : x
2. Step 2: Convert to fraction form
   1,431.14/1,972.86 = 1,010.12/x
3. Step 3: Cross multiply
   1,431.14x = 1,972.86 × 1,010.12
4. Step 4: Simplify right side
   1,431.14x = 1,992,825.34
5. Step 5: Solve for x
   x = 1,992,825.34/1,431.14
6. Step 6: Final answer
   x = 1,392.47