Finding the Fourth Proportional to 7,123.95, 10,687.34 and 3,611.18

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.95 : 10,687.34 = 3,611.18 : x
2. Step 2: Convert to fraction form
   7,123.95/10,687.34 = 3,611.18/x
3. Step 3: Cross multiply
   7,123.95x = 10,687.34 × 3,611.18
4. Step 4: Simplify right side
   7,123.95x = 38,593,944.21
5. Step 5: Solve for x
   x = 38,593,944.21/7,123.95
6. Step 6: Final answer
   x = 5,417.49