Finding the Fourth Proportional to 3,918.84, 5,878.42 and 997.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.84 : 5,878.42 = 997.18 : x
2. Step 2: Convert to fraction form
   3,918.84/5,878.42 = 997.18/x
3. Step 3: Cross multiply
   3,918.84x = 5,878.42 × 997.18
4. Step 4: Simplify right side
   3,918.84x = 5,861,842.86
5. Step 5: Solve for x
   x = 5,861,842.86/3,918.84
6. Step 6: Final answer
   x = 1,495.81