Finding the Fourth Proportional to 3,915.81, 5,870.04 and 1,316.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.81 : 5,870.04 = 1,316.93 : x
2. Step 2: Convert to fraction form
   3,915.81/5,870.04 = 1,316.93/x
3. Step 3: Cross multiply
   3,915.81x = 5,870.04 × 1,316.93
4. Step 4: Simplify right side
   3,915.81x = 7,730,431.78
5. Step 5: Solve for x
   x = 7,730,431.78/3,915.81
6. Step 6: Final answer
   x = 1,974.16