Finding the Fourth Proportional to 21,906.31, 32,875.31 and 8,762.35

Step by Step Solution

1. Step 1: Write the proportion equation
   21,906.31 : 32,875.31 = 8,762.35 : x
2. Step 2: Convert to fraction form
   21,906.31/32,875.31 = 8,762.35/x
3. Step 3: Cross multiply
   21,906.31x = 32,875.31 × 8,762.35
4. Step 4: Simplify right side
   21,906.31x = 288,064,972.58
5. Step 5: Solve for x
   x = 288,064,972.58/21,906.31
6. Step 6: Final answer
   x = 13,149.86