Finding the Fourth Proportional to 42,589.12, 63,825.28 and 26,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,589.12 : 63,825.28 = 26,978.72 : x
2. Step 2: Convert to fraction form
   42,589.12/63,825.28 = 26,978.72/x
3. Step 3: Cross multiply
   42,589.12x = 63,825.28 × 26,978.72
4. Step 4: Simplify right side
   42,589.12x = 1,721,924,358.04
5. Step 5: Solve for x
   x = 1,721,924,358.04/42,589.12
6. Step 6: Final answer
   x = 40,431.09