Finding the Fourth Proportional to 28,264.12, 42,368.42 and 15,790.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,264.12 : 42,368.42 = 15,790.12 : x
2. Step 2: Convert to fraction form
   28,264.12/42,368.42 = 15,790.12/x
3. Step 3: Cross multiply
   28,264.12x = 42,368.42 × 15,790.12
4. Step 4: Simplify right side
   28,264.12x = 669,002,436.01
5. Step 5: Solve for x
   x = 669,002,436.01/28,264.12
6. Step 6: Final answer
   x = 23,669.67