Finding the Fourth Proportional to 21,902.78, 32,871.18 and 8,756.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,902.78 : 32,871.18 = 8,756.48 : x
2. Step 2: Convert to fraction form
   21,902.78/32,871.18 = 8,756.48/x
3. Step 3: Cross multiply
   21,902.78x = 32,871.18 × 8,756.48
4. Step 4: Simplify right side
   21,902.78x = 287,835,830.25
5. Step 5: Solve for x
   x = 287,835,830.25/21,902.78
6. Step 6: Final answer
   x = 13,141.52