Finding the Fourth Proportional to 28,156.87, 42,242.01 and 9,436.96

Step by Step Solution

1. Step 1: Write the proportion equation
   28,156.87 : 42,242.01 = 9,436.96 : x
2. Step 2: Convert to fraction form
   28,156.87/42,242.01 = 9,436.96/x
3. Step 3: Cross multiply
   28,156.87x = 42,242.01 × 9,436.96
4. Step 4: Simplify right side
   28,156.87x = 398,636,158.69
5. Step 5: Solve for x
   x = 398,636,158.69/28,156.87
6. Step 6: Final answer
   x = 14,157.69