Finding the Fourth Proportional to 3,907.12, 5,810.51 and 3,784.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,907.12 : 5,810.51 = 3,784.09 : x
2. Step 2: Convert to fraction form
   3,907.12/5,810.51 = 3,784.09/x
3. Step 3: Cross multiply
   3,907.12x = 5,810.51 × 3,784.09
4. Step 4: Simplify right side
   3,907.12x = 21,987,492.79
5. Step 5: Solve for x
   x = 21,987,492.79/3,907.12
6. Step 6: Final answer
   x = 5,627.54