Finding the Fourth Proportional to 7,478.86, 10,320.82 and 4,121.67

Step by Step Solution

1. Step 1: Write the proportion equation
   7,478.86 : 10,320.82 = 4,121.67 : x
2. Step 2: Convert to fraction form
   7,478.86/10,320.82 = 4,121.67/x
3. Step 3: Cross multiply
   7,478.86x = 10,320.82 × 4,121.67
4. Step 4: Simplify right side
   7,478.86x = 42,539,014.17
5. Step 5: Solve for x
   x = 42,539,014.17/7,478.86
6. Step 6: Final answer
   x = 5,687.90