Finding the Fourth Proportional to 11,931.48, 17,900.02 and 3,611.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,931.48 : 17,900.02 = 3,611.56 : x
2. Step 2: Convert to fraction form
   11,931.48/17,900.02 = 3,611.56/x
3. Step 3: Cross multiply
   11,931.48x = 17,900.02 × 3,611.56
4. Step 4: Simplify right side
   11,931.48x = 64,646,996.23
5. Step 5: Solve for x
   x = 64,646,996.23/11,931.48
6. Step 6: Final answer
   x = 5,418.19