Finding the Fourth Proportional to 10,985.76, 16,480.72 and 4,412.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.76 : 16,480.72 = 4,412.46 : x
2. Step 2: Convert to fraction form
   10,985.76/16,480.72 = 4,412.46/x
3. Step 3: Cross multiply
   10,985.76x = 16,480.72 × 4,412.46
4. Step 4: Simplify right side
   10,985.76x = 72,720,517.77
5. Step 5: Solve for x
   x = 72,720,517.77/10,985.76
6. Step 6: Final answer
   x = 6,619.53