Finding the Fourth Proportional to 65,338.42, 90,153.28 and 42,710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,338.42 : 90,153.28 = 42,710.72 : x
2. Step 2: Convert to fraction form
   65,338.42/90,153.28 = 42,710.72/x
3. Step 3: Cross multiply
   65,338.42x = 90,153.28 × 42,710.72
4. Step 4: Simplify right side
   65,338.42x = 3,850,511,499.16
5. Step 5: Solve for x
   x = 3,850,511,499.16/65,338.42
6. Step 6: Final answer
   x = 58,931.81