Finding the Fourth Proportional to 28,217.77, 42,280.18 and 21,962.04

Step by Step Solution

1. Step 1: Write the proportion equation
   28,217.77 : 42,280.18 = 21,962.04 : x
2. Step 2: Convert to fraction form
   28,217.77/42,280.18 = 21,962.04/x
3. Step 3: Cross multiply
   28,217.77x = 42,280.18 × 21,962.04
4. Step 4: Simplify right side
   28,217.77x = 928,558,790.91
5. Step 5: Solve for x
   x = 928,558,790.91/28,217.77
6. Step 6: Final answer
   x = 32,906.88