Finding the Fourth Proportional to 64,408.72, 88,891.44 and 42,897.28

Step by Step Solution

1. Step 1: Write the proportion equation
   64,408.72 : 88,891.44 = 42,897.28 : x
2. Step 2: Convert to fraction form
   64,408.72/88,891.44 = 42,897.28/x
3. Step 3: Cross multiply
   64,408.72x = 88,891.44 × 42,897.28
4. Step 4: Simplify right side
   64,408.72x = 3,813,200,991.28
5. Step 5: Solve for x
   x = 3,813,200,991.28/64,408.72
6. Step 6: Final answer
   x = 59,203.18