Finding the Fourth Proportional to 28,162.68, 42,204.54 and 21,894

Step by Step Solution

1. Step 1: Write the proportion equation
   28,162.68 : 42,204.54 = 21,894 : x
2. Step 2: Convert to fraction form
   28,162.68/42,204.54 = 21,894/x
3. Step 3: Cross multiply
   28,162.68x = 42,204.54 × 21,894
4. Step 4: Simplify right side
   28,162.68x = 924,026,198.76
5. Step 5: Solve for x
   x = 924,026,198.76/28,162.68
6. Step 6: Final answer
   x = 32,810.31