Finding the Fourth Proportional to 7,386.90, 10,184.18 and 5,687.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,386.90 : 10,184.18 = 5,687.31 : x
2. Step 2: Convert to fraction form
   7,386.90/10,184.18 = 5,687.31/x
3. Step 3: Cross multiply
   7,386.90x = 10,184.18 × 5,687.31
4. Step 4: Simplify right side
   7,386.90x = 57,920,630.50
5. Step 5: Solve for x
   x = 57,920,630.50/7,386.90
6. Step 6: Final answer
   x = 7,841.00