Finding the Fourth Proportional to 3,787.98, 5,639.30 and 3,769.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,787.98 : 5,639.30 = 3,769.62 : x
2. Step 2: Convert to fraction form
   3,787.98/5,639.30 = 3,769.62/x
3. Step 3: Cross multiply
   3,787.98x = 5,639.30 × 3,769.62
4. Step 4: Simplify right side
   3,787.98x = 21,257,999.22
5. Step 5: Solve for x
   x = 21,257,999.22/3,787.98
6. Step 6: Final answer
   x = 5,611.96