Finding the Fourth Proportional to 1,411.84, 1,948.80 and 997.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.84 : 1,948.80 = 997.12 : x
2. Step 2: Convert to fraction form
   1,411.84/1,948.80 = 997.12/x
3. Step 3: Cross multiply
   1,411.84x = 1,948.80 × 997.12
4. Step 4: Simplify right side
   1,411.84x = 1,943,187.46
5. Step 5: Solve for x
   x = 1,943,187.46/1,411.84
6. Step 6: Final answer
   x = 1,376.35