Finding the Fourth Proportional to 1,429.47, 1,971.75 and 981.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.47 : 1,971.75 = 981.12 : x
2. Step 2: Convert to fraction form
   1,429.47/1,971.75 = 981.12/x
3. Step 3: Cross multiply
   1,429.47x = 1,971.75 × 981.12
4. Step 4: Simplify right side
   1,429.47x = 1,934,523.36
5. Step 5: Solve for x
   x = 1,934,523.36/1,429.47
6. Step 6: Final answer
   x = 1,353.32