Finding the Fourth Proportional to 3,913.82, 5,870.95 and 992.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,913.82 : 5,870.95 = 992.15 : x
2. Step 2: Convert to fraction form
   3,913.82/5,870.95 = 992.15/x
3. Step 3: Cross multiply
   3,913.82x = 5,870.95 × 992.15
4. Step 4: Simplify right side
   3,913.82x = 5,824,875.24
5. Step 5: Solve for x
   x = 5,824,875.24/3,913.82
6. Step 6: Final answer
   x = 1,488.28