Finding the Fourth Proportional to 21,051.28, 31,574.40 and 16,375.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,051.28 : 31,574.40 = 16,375.96 : x
2. Step 2: Convert to fraction form
   21,051.28/31,574.40 = 16,375.96/x
3. Step 3: Cross multiply
   21,051.28x = 31,574.40 × 16,375.96
4. Step 4: Simplify right side
   21,051.28x = 517,061,111.42
5. Step 5: Solve for x
   x = 517,061,111.42/21,051.28
6. Step 6: Final answer
   x = 24,561.98