Finding the Fourth Proportional to 28,490.99, 42,736.01 and 10,964.61

Step by Step Solution

1. Step 1: Write the proportion equation
   28,490.99 : 42,736.01 = 10,964.61 : x
2. Step 2: Convert to fraction form
   28,490.99/42,736.01 = 10,964.61/x
3. Step 3: Cross multiply
   28,490.99x = 42,736.01 × 10,964.61
4. Step 4: Simplify right side
   28,490.99x = 468,583,627.78
5. Step 5: Solve for x
   x = 468,583,627.78/28,490.99
6. Step 6: Final answer
   x = 16,446.73