Finding the Fourth Proportional to 10,665.60, 16,000.42 and 4,822.19

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.60 : 16,000.42 = 4,822.19 : x
2. Step 2: Convert to fraction form
   10,665.60/16,000.42 = 4,822.19/x
3. Step 3: Cross multiply
   10,665.60x = 16,000.42 × 4,822.19
4. Step 4: Simplify right side
   10,665.60x = 77,157,065.32
5. Step 5: Solve for x
   x = 77,157,065.32/10,665.60
6. Step 6: Final answer
   x = 7,234.20