Finding the Fourth Proportional to 7,111.60, 10,664.64 and 3,411.84

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.60 : 10,664.64 = 3,411.84 : x
2. Step 2: Convert to fraction form
   7,111.60/10,664.64 = 3,411.84/x
3. Step 3: Cross multiply
   7,111.60x = 10,664.64 × 3,411.84
4. Step 4: Simplify right side
   7,111.60x = 36,386,045.34
5. Step 5: Solve for x
   x = 36,386,045.34/7,111.60
6. Step 6: Final answer
   x = 5,116.44