Finding the Fourth Proportional to 3,687.83, 5,084.32 and 2,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,687.83 : 5,084.32 = 2,978.88 : x
2. Step 2: Convert to fraction form
   3,687.83/5,084.32 = 2,978.88/x
3. Step 3: Cross multiply
   3,687.83x = 5,084.32 × 2,978.88
4. Step 4: Simplify right side
   3,687.83x = 15,145,558.23
5. Step 5: Solve for x
   x = 15,145,558.23/3,687.83
6. Step 6: Final answer
   x = 4,106.90