Finding the Fourth Proportional to 5,641.31, 7,787.55 and 3,756.23

Step by Step Solution

1. Step 1: Write the proportion equation
   5,641.31 : 7,787.55 = 3,756.23 : x
2. Step 2: Convert to fraction form
   5,641.31/7,787.55 = 3,756.23/x
3. Step 3: Cross multiply
   5,641.31x = 7,787.55 × 3,756.23
4. Step 4: Simplify right side
   5,641.31x = 29,251,828.94
5. Step 5: Solve for x
   x = 29,251,828.94/5,641.31
6. Step 6: Final answer
   x = 5,185.29