Finding the Fourth Proportional to 42,969.52, 59,258.28 and 28,637.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,969.52 : 59,258.28 = 28,637.40 : x
2. Step 2: Convert to fraction form
   42,969.52/59,258.28 = 28,637.40/x
3. Step 3: Cross multiply
   42,969.52x = 59,258.28 × 28,637.40
4. Step 4: Simplify right side
   42,969.52x = 1,697,003,067.67
5. Step 5: Solve for x
   x = 1,697,003,067.67/42,969.52
6. Step 6: Final answer
   x = 39,493.18