Finding the Fourth Proportional to 9,860.30, 13,607.60 and 5,612.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860.30 : 13,607.60 = 5,612.10 : x
2. Step 2: Convert to fraction form
   9,860.30/13,607.60 = 5,612.10/x
3. Step 3: Cross multiply
   9,860.30x = 13,607.60 × 5,612.10
4. Step 4: Simplify right side
   9,860.30x = 76,367,211.96
5. Step 5: Solve for x
   x = 76,367,211.96/9,860.30
6. Step 6: Final answer
   x = 7,744.92