Finding the Fourth Proportional to 2,113.67, 3,158.45 and 1,583.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.67 : 3,158.45 = 1,583.15 : x
2. Step 2: Convert to fraction form
   2,113.67/3,158.45 = 1,583.15/x
3. Step 3: Cross multiply
   2,113.67x = 3,158.45 × 1,583.15
4. Step 4: Simplify right side
   2,113.67x = 5,000,276.41
5. Step 5: Solve for x
   x = 5,000,276.41/2,113.67
6. Step 6: Final answer
   x = 2,365.69