Finding the Fourth Proportional to 3,870.62, 5,813.40 and 3,316.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.62 : 5,813.40 = 3,316.58 : x
2. Step 2: Convert to fraction form
   3,870.62/5,813.40 = 3,316.58/x
3. Step 3: Cross multiply
   3,870.62x = 5,813.40 × 3,316.58
4. Step 4: Simplify right side
   3,870.62x = 19,280,606.17
5. Step 5: Solve for x
   x = 19,280,606.17/3,870.62
6. Step 6: Final answer
   x = 4,981.27