Finding the Fourth Proportional to 21,702.52, 32,554.72 and 10,618.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,702.52 : 32,554.72 = 10,618.54 : x
2. Step 2: Convert to fraction form
   21,702.52/32,554.72 = 10,618.54/x
3. Step 3: Cross multiply
   21,702.52x = 32,554.72 × 10,618.54
4. Step 4: Simplify right side
   21,702.52x = 345,683,407.19
5. Step 5: Solve for x
   x = 345,683,407.19/21,702.52
6. Step 6: Final answer
   x = 15,928.26