Finding the Fourth Proportional to 21,431.55, 32,151.93 and 10,903.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,431.55 : 32,151.93 = 10,903.05 : x
2. Step 2: Convert to fraction form
   21,431.55/32,151.93 = 10,903.05/x
3. Step 3: Cross multiply
   21,431.55x = 32,151.93 × 10,903.05
4. Step 4: Simplify right side
   21,431.55x = 350,554,100.39
5. Step 5: Solve for x
   x = 350,554,100.39/21,431.55
6. Step 6: Final answer
   x = 16,356.92