Finding the Fourth Proportional to 21,379.77, 32,039.28 and 10,123.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,379.77 : 32,039.28 = 10,123.10 : x
2. Step 2: Convert to fraction form
   21,379.77/32,039.28 = 10,123.10/x
3. Step 3: Cross multiply
   21,379.77x = 32,039.28 × 10,123.10
4. Step 4: Simplify right side
   21,379.77x = 324,336,795.32
5. Step 5: Solve for x
   x = 324,336,795.32/21,379.77
6. Step 6: Final answer
   x = 15,170.27