Finding the Fourth Proportional to 28,157.94, 42,224.42 and 8,432.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,157.94 : 42,224.42 = 8,432.82 : x
2. Step 2: Convert to fraction form
   28,157.94/42,224.42 = 8,432.82/x
3. Step 3: Cross multiply
   28,157.94x = 42,224.42 × 8,432.82
4. Step 4: Simplify right side
   28,157.94x = 356,070,933.46
5. Step 5: Solve for x
   x = 356,070,933.46/28,157.94
6. Step 6: Final answer
   x = 12,645.49