Finding the Fourth Proportional to 7,857.63, 10,843.59 and 4,320.90

Step by Step Solution

1. Step 1: Write the proportion equation
   7,857.63 : 10,843.59 = 4,320.90 : x
2. Step 2: Convert to fraction form
   7,857.63/10,843.59 = 4,320.90/x
3. Step 3: Cross multiply
   7,857.63x = 10,843.59 × 4,320.90
4. Step 4: Simplify right side
   7,857.63x = 46,854,068.03
5. Step 5: Solve for x
   x = 46,854,068.03/7,857.63
6. Step 6: Final answer
   x = 5,962.88