Finding the Fourth Proportional to 11,618.52, 17,428.05 and 3,722.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,618.52 : 17,428.05 = 3,722.55 : x
2. Step 2: Convert to fraction form
   11,618.52/17,428.05 = 3,722.55/x
3. Step 3: Cross multiply
   11,618.52x = 17,428.05 × 3,722.55
4. Step 4: Simplify right side
   11,618.52x = 64,876,787.53
5. Step 5: Solve for x
   x = 64,876,787.53/11,618.52
6. Step 6: Final answer
   x = 5,583.91