Finding the Fourth Proportional to 21,385.62, 32,075.69 and 8,903.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,385.62 : 32,075.69 = 8,903.31 : x
2. Step 2: Convert to fraction form
   21,385.62/32,075.69 = 8,903.31/x
3. Step 3: Cross multiply
   21,385.62x = 32,075.69 × 8,903.31
4. Step 4: Simplify right side
   21,385.62x = 285,579,767.02
5. Step 5: Solve for x
   x = 285,579,767.02/21,385.62
6. Step 6: Final answer
   x = 13,353.83