Finding the Fourth Proportional to 7,153.78, 9,870.60 and 4,321.62

Step by Step Solution

1. Step 1: Write the proportion equation
   7,153.78 : 9,870.60 = 4,321.62 : x
2. Step 2: Convert to fraction form
   7,153.78/9,870.60 = 4,321.62/x
3. Step 3: Cross multiply
   7,153.78x = 9,870.60 × 4,321.62
4. Step 4: Simplify right side
   7,153.78x = 42,656,982.37
5. Step 5: Solve for x
   x = 42,656,982.37/7,153.78
6. Step 6: Final answer
   x = 5,962.86