Finding the Fourth Proportional to 67,638.66, 101,448.27 and 28,188.42

Step by Step Solution

1. Step 1: Write the proportion equation
   67,638.66 : 101,448.27 = 28,188.42 : x
2. Step 2: Convert to fraction form
   67,638.66/101,448.27 = 28,188.42/x
3. Step 3: Cross multiply
   67,638.66x = 101,448.27 × 28,188.42
4. Step 4: Simplify right side
   67,638.66x = 2,859,666,443.03
5. Step 5: Solve for x
   x = 2,859,666,443.03/67,638.66
6. Step 6: Final answer
   x = 42,278.58