Finding the Fourth Proportional to 28,624.50, 42,938.91 and 10,156.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,624.50 : 42,938.91 = 10,156.50 : x
2. Step 2: Convert to fraction form
   28,624.50/42,938.91 = 10,156.50/x
3. Step 3: Cross multiply
   28,624.50x = 42,938.91 × 10,156.50
4. Step 4: Simplify right side
   28,624.50x = 436,109,039.42
5. Step 5: Solve for x
   x = 436,109,039.42/28,624.50
6. Step 6: Final answer
   x = 15,235.52