Finding the Fourth Proportional to 3,913.31, 5,870.88 and 1,316.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,913.31 : 5,870.88 = 1,316.25 : x
2. Step 2: Convert to fraction form
   3,913.31/5,870.88 = 1,316.25/x
3. Step 3: Cross multiply
   3,913.31x = 5,870.88 × 1,316.25
4. Step 4: Simplify right side
   3,913.31x = 7,727,545.80
5. Step 5: Solve for x
   x = 7,727,545.80/3,913.31
6. Step 6: Final answer
   x = 1,974.68